So the girl practiced for 23/10 hours, which is equivalent to 2.3 hours. Since 2.3 hours is less than three hours, she did not meet her goal of practicing for at least three hours.
What is fraction?
A fraction is a mathematical term that represents a part of a whole or a ratio between two quantities. It is a way of expressing a number as a quotient of two integers, where the top number is called the numerator, and the bottom number is called the denominator.
To determine if the girl met her goal of practicing for at least three hours, we need to add up the total number of hours she practiced on Monday, Tuesday, and Wednesday:
Monday: 2/2 hours
Tuesday: 2/5 hours
Wednesday: 9/10 hours
To add these fractions, we need to find a common denominator, which in this case is 10:
Monday: 2/2 = 10/10 hours
Tuesday: 2/5 = 4/10 hours
Wednesday: 9/10 hours
Now we can add these fractions:
10/10 + 4/10 + 9/10 = 23/10 hours
So the girl practiced for 23/10 hours, which is equivalent to 2.3 hours. Since 2.3 hours is less than three hours, she did not meet her goal of practicing for at least three hours.
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A two-bedroom house in Seattle was worth $400,000 in 2005. Its appreciation rate is 3.5% each year.
a. How much is the house worth in 2015?
b. When will it be worth $800, 000?
c. In Jacksonville, houses are depreciating at 2% per year. If a house is worth $200, 000 now, how much value
will it have lost in 10 years?
Answers:
(a) $564,239.50
(b) 2026
(c) $36,585.44
==========================================
Explanation:
Part (a)
One template for exponential equations would be
y = a*b^x
Another template is
y = a(1+r)^x
which is a bit more descriptive. I'll use the second template.
a = 400000 = starting valuer = 0.035 = growth rate in decimal formr is positive for exponential growth or appreciation.
The equation y = a(1+r)^x updates to y = 400000*(1+0.035)^x and then simplifies to y = 400000*(1.035)^x
From here we plug in x = 10 because the year 2015 is ten years after 2005.
So,
y = 400000*(1.035)^x
y = 400000*(1.035)^10
y = 564239.504248449
y = 564239.50
The house is worth about $564,239.50 in the year 2015.
------------
Part (b)
We work the process of part (a) in reverse.
This time we know what y is and we want to solve for x.
Use logarithms to isolate the exponent.
y = 400000*(1.035)^x
800000 = 400000(1.035)^x
800000/400000 = (1.035)^x
2 = (1.035)^x
Log(2) = Log( (1.035)^x )
Log(2) = x*Log( 1.035 )
x = Log(2)/Log(1.035)
x = 20.1487916840008
If x = 20, then,
y = 400000*(1.035)^x
y = 400000*(1.035)^20
y = 795,915.545386338
y = 795,915.55
We're short of the goal of $800,000.
If x = 21, then
y = 400000*(1.035)^x
y = 400000*(1.035)^21
y = 823,772.589474859
y = 823,772.59
We've gone over the goal.
Somewhere between x = 20 and x = 21 is when the house will be worth exactly $800,000.
It's better to side with x = 21 since x = 20 comes up short.
21 years after 2005 is 2005+21 = 2026
------------
Part (c)
Go back to the template: y = a(1+r)^x
This time we have
a = 200,000r = -0.02The r value is negative to indicate exponential decay or depreciation.
y = a(1+r)^x
y = 200000(1+(-0.02))^x
y = 200000(1-0.02)^x
y = 200000(0.98)^x
The 0.98 means the house keeps 98% of its value from year to year.
Plug in x = 10.
y = 200000(0.98)^x
y = 200000(0.98)^10
y = 163,414.56137751
y = 163,414.56
The house starts off at $200,000 and ten years later it's $163,414.56
Subtract the values to determine how much home value was lost.
200,000 - 163,414.56 = 36,585.44
The home value will have lost $36,585.44 over the 10 year period.
a factory has a machine which bends wire at a rate of 2 unit(s) of curvature per second. how long does it take to bend a straight wire into a circle of radius 4?
If a factory machine bends wire at rate of 2 units of curvature per second, then the time required to bend the "straight-wire" into a circle of radius of 4 is 12.56 seconds.
The "Circumference" of a circle is defined as the total length of the curve which makes up the circle's outer boundary,
The formula for "circumference" of a circle is ⇒ C = 2 × π × r,
where "C" = circumference, "π" ≈ 3.14159, and "r" = radius,
In this case, the radius of circle is = 4 units,
So, we substitute "r" = 4,
We get,
⇒ Circumference = 2 × π × 4,
⇒ Circumference = 8π
The machine bends wire at a rate of 2 units of curvature per second, we use the circumference of circle to calculate how long it takes to bend the wire into a complete circle.
The machine bends 2 units of curvature per second, and the circumference of the circle is 8π units,
So, the time taken to bend wire into a complete circle is :
⇒ Time = (Circumference)/(Rate of bending),
⇒ Time = 8π/2,
⇒ Time = 4π ≈ 12.56 seconds.
Therefore, it would take approximately 12.56 seconds to bend a "straight-wire" into a circle.
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you are in charge of conducting a very important study on the efficacy of imitrex on migraine sufferers. you ask 25 women to test this drug. each of the 25 women is given 'excedrin for migraines' immediately after the onset of their first migraine, after which you measure the time it takes for the headache to subside. after the onset of their second migraine, you give them imitrex and again measure the time it takes for the headache to subside. assuming the data are normally distributed, which is the most appropriate statistical test to determine if imitrex works better than excedrin at eliminating migraines?
If the p-value obtained from the paired t-test is less than the predetermined level of significance (usually 0.05), then it can be concluded that there is a statistically significant difference between the two treatments, and that imitrex is more effective than excedrin at eliminating migraines.
To determine if Imitrex works better than Excedrin at eliminating migraines in your study, the most appropriate statistical test to use is the Paired Samples t-test.
This test is suitable because:
We have two related samples: the same 25 women are given both Excedrin and Imitrex, so their response times are paired.
We're comparing the mean response times between two treatments, which requires a t-test.
The data is assumed to be normally distributed.
To conduct the Paired Samples t-test, follow these steps:
Calculate the difference in response times for each woman (Imitrex time - Excedrin time).
Calculate the mean of these differences.
Calculate the standard deviation of the differences.
Determine the degrees of freedom (25 women - 1 = 24).
Using the mean, standard deviation, and degrees of freedom, calculate the t-statistic.
Compare the t-statistic to the critical value from the t-distribution table, using your chosen significance level (e.g., 0.05).
If the t-statistic is greater than the critical value, reject the null hypothesis, concluding that there's a significant difference between the effectiveness of Imitrex and Excedrin for migraine relief.
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To determine if Imitrex works better than Excedrin, the most appropriate statistical test to use would be a "paired t-test."
We are comparing the efficacy of Imitrex and Excedrin for Migraine in the same group of 25 women, with each woman acting as her own control. You are measuring the time it takes for the headache to subside after administering each drug. To determine if Imitrex works better than Excedrin, the most appropriate statistical test to use would be a "paired t-test."
Step-by-step explanation:
1. Record the time it takes for the headache to subside after administering Excedrin and Imitrex to each woman.
2. Calculate the difference in time for each woman between the two drugs.
3. Compute the mean and standard deviation of these differences.
4. Perform a paired t-test to compare the mean difference to 0 (no difference between the two drugs).
5. Assess the p-value obtained from the t-test. If the p-value is less than the significance level (usually 0.05), then you can conclude that there is a statistically significant difference between the two drugs, suggesting that Imitrex works better than Excedrin in eliminating migraines.
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verify that the given functions are solutions of the homogeneous linear systempute the wronskian of the solution set. on the basis of this calculation, can you assert that the set of solutions forms a fundamental set?if the given solutions form a fundamental set, state the general solution of the linear homogeneous system. express the general solution as the product , where is a square matrix whose columns are the solutions forming the fundamental set and c is a column vector of arbitrary constants.if the solutions form a fundamental set, impose the given initial condition and find the unique solution of the initial value problem.
Given functions:
f1(x) = e^2x
f2(x) = e^-x
The homogeneous linear system is:
y' = Ay
where A = [2 -1]
The Wronskian of the solution set is:
W(f1, f2) = e^3x - e^-x
Since the Wronskian is not equal to 0
I need this answer asap can someone help?
Therefore, the shortest driving distance from the greenhouse to the animal shelter is approximately 6.08 units (rounded to two decimal places).
What is distance?Distance is a measure of the physical space between two objects or points. It refers to the length of the path travelled by an object moving from one point to another, and is typically measured in units such as meters, kilometers, feet, miles, or other similar units of length. Distance can be calculated using various methods such as using the distance formula in mathematics or using measuring tools such as rulers, tape measures, or GPS devices. Distance is an important concept in physics, engineering, geography, and many other fields that involve measurements of space and motion.
Here,
We can use the distance formula to calculate the shortest driving distance between the coordinates (2,3) and (3,-3):
d = √((x₂ - x₁)² + (y₂ - y₁)²)
where
x₁ = 2
y₁ = 3
x₂ = 3
y₂ = -3
Substituting the values, we get:
d = √((3 - 2)² + (-3 - 3)²)
d = √(1² + (-6)²)
d = √(1 + 36)
d = √(37)
=6.08 feet
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a packaging company strives to maintain a constant temperature for its packages that require a specific temperature range. it is believed that the temperature of packages follows a normal distribution with a mean of 5 degrees celsius and a standard deviation of 0.3 degree celsius. inspectors take weekly samples for 5 weeks of eight randomly selected boxes and report their temperatures. the five weekly sample means are shown in the table below. week 1 4.97 week 2 5.16 week 3 5.12 week 4 5.35 week 5 5.50 how many points are outside the control limits?
There are no points outside the control limits, since all of the weekly sample means are within the range of 4.7 to 5.3 degrees Celsius (the mean of 5 degrees Celsius plus or minus 0.3 degrees Celsius).
If anyone is reading this rn i would be so flipping happy if you solves this for me i have been putting this same question up for 2 days now and 9 times please help me
Answer: E
Step-by-step explanation: The line going up has a slope of one and the y intercept is 2. The first equation should be y=x+2. The next one has a downwards slope with a y intercept of -4. y=-x-4. Ths means it would be E
Verify that the segments are parallel.
10. CD || AB
This means that the corresponding sides of the two triangles are in proportion, and therefore CD is parallel to AB, as required.
What is triangle?A triangle is a polygon with three sides and three angles. It is one of the basic shapes in geometry and is often used in mathematics, science, engineering, and art. Triangles can be classified into different types based on the length of their sides and the size of their angles. Triangles are used in various applications, such as in the construction of buildings, bridges, and other structures, as well as in navigation and surveying. They are also important in various fields of mathematics, including trigonometry and geometry.
Here,
To use similarity theorems to show that CD is parallel to AB, we need to first establish that triangles AEB and CED are similar. If we can show that these triangles are similar, then we can use the corresponding angles theorem, which states that if two pairs of corresponding angles are congruent, then the lines containing the sides are parallel.
Let's compare the two triangles AEB and CED:
Angle AEB is congruent to angle CED (both are vertical angles).
Angle EAB is congruent to angle ECD (both are alternate interior angles formed by a transversal cutting parallel lines AB and CD).
Angle BAE is congruent to angle DCE (both are alternate interior angles formed by a transversal cutting parallel lines AB and CD).
Therefore, we have established that triangles AEB and CED are similar by the angle-angle-angle similarity theorem.
Now that we have shown that the triangles are similar, we can use the corresponding sides theorem, which states that the corresponding sides of similar triangles are in proportion, to find out if CD is parallel to AB.
The corresponding sides of AEB and CED are:
AE/CE = AB/CD
Substituting the given values, we have:
AC + CE / CE = AB / BD
4 + 12 / 12 = AB / (14/3)
16/12 = AB / (14/3)
AB = (16/12) x (14/3)
= 56/9
Now we can use the corresponding sides theorem to find the length of CD:
AE/CE = AB/CD
Substituting the values we have found, we get:
4/12 = (56/9)/CD
CD = (56/9) x (12/4)
= 14
Since we have found that AB = 56/9 and CD = 14, we can see that:
AB/CD = (56/9)/14
= 4/3
This means that the corresponding sides of the two triangles are in proportion, and therefore CD is parallel to AB, as required.
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A circle with center O and radius 5 has central angle XOY. X and Y are points on the circle. If the measure of arc XY is 90 degrees, what is the length of chord XY?
The length of chord XY is 5√2.
What is the length of the chord?
It is described as the line segment that connects any two points on the circle's circumference without going through the circle's center. As a result, the diameter is the chord of a particular circle that is the longest and goes through its center. In mathematics, determining the chord's length can be crucial at times.
Here, we have
Given: A circle with center O and radius 5 has a central angle XOY. X and Y are points on the circle. If the measure of arc XY is 90 degrees.
We have to find the length of chord XY.
∠XOY = 90°
OX = OY = 5
We draw a perpendicular from the center to chord XY bisect XY at D.
Now, since OD bisects ∠XOY
∠XOD = ∠YOD = 90°/2 = 45°
Now, in ΔXOD
sin45° = XD/OX
1/√2 = XD/5
5/√2 = XD...(1)
In ΔYOD
sin45° = YD/OY
5/√2 = YD...(2)
Adding (1) and (2), we get
XD + YD = 5/√2 + 5/√2
XY = 5√2
Hence, the length of chord XY is 5√2.
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rectangle is inscribed in triangle such that side of the rectangle is on side of the triangle, as shown. the triangle's altitude from to side is 7 inches, and . the length of segment is equal to half the length of segment . what is the area of rectangle ? express your answer as a common fraction.
The area of the rectangle is (343/48)sqrt(3), or approximately 6.177 square inches.
To solve this problem, we first need to draw a diagram. Let ABC be the triangle, with altitude AD of length 7 inches. Let EF be the rectangle inscribed in the triangle, with one side on AB. Let G be the point where EF meets AD. Let AG have length x, and GD have length y.
Since EF is a rectangle, its opposite sides are parallel. Therefore, EF is parallel to BC. Furthermore, EF and BC have the same length, since EF is inscribed in the triangle. Let the length of EF (and BC) be z.
Since AG and GD are the two parts of AD that EF intersects, we have x+y=7.
Since EF is half the length of BC, we have z=0.5(AB).
The area of the rectangle is zy. Using similar triangles, we can see that (x/z) = (y/(7-z)). Solving this equation for y, we get y=(7z)/(2z+x). Substituting this expression for y into the expression for the area of the rectangle, we get:
Area of rectangle = zy =
[tex](7z^2)/(2z+x)[/tex]
To find the value of z, we use the fact that z=0.5(AB). Using the Pythagorean theorem in triangle ABC, we have:
[tex]AB^2 = AD^2 + BD^2 = 7^2 + (2z)^2 [/tex]
[tex]= 49 + 4z^2[/tex]
Using the fact that z=0.5(AB), we can solve for z:
[tex]z^2 = (AB^2)/16[/tex]
[tex]
= [(49 + 4z^2)/16][/tex]
Multiplying both sides by 16 and rearranging, we get:
[tex]12z^2 = 49[/tex]
[tex]z^2 = 49/12[/tex]
[tex]z = (7/2) \sqrt{} (3)/2[/tex]
Now we can substitute this value of z into the expression for the area of the rectangle:
Area of rectangle =
[tex][(7/2) \sqrt{} (3)/2][(49/3+4(49/48))][/tex]
[tex] = (343/48) \sqrt{} (3)[/tex]
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consider all undergraduate students at a local university to be a population. in this population, the proportion of students who live on campus is 0.23. in a random sample of 300 students from this population, the proportion who live on campus is 0.19. we would call the number 0.19 a a. z-score. b. p-value. c. parameter. d. statistic. e. significance level.
The number 0.19 is a d. statistic, which represents a numerical summary of a sample. The z-score would be calculated by (0.19 - 0.23) / sqrt((0.23 * 0.77) / 300) and would indicate how many standard deviations the sample proportion is from the population proportion.
The p-value and significance level would be used in hypothesis testing to determine the likelihood of obtaining a sample proportion as extreme or more extreme than the observed proportion, assuming the null hypothesis is true.
The parameter is the true proportion of all undergraduate students at the local university who live on campus, which is estimated by the sample statistic.
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Cual es la constante de proporcionalidad para encontrar la cantidad por pagar a partir del número de cocadas si ni sabes no contestes o si no te denunció
The proportionality constant to find the amount to be paid based on the number of "cocadas" is the price per "cocada"
Proportionality constant is a mathematical term that refers to the constant value that relates two variables that are directly proportional to each other.
The proportionality constant to find the amount to be paid based on the number of "cocadas" will depend on the price per "cocada".
Let's say the price per "cocada" is represented by the variable "p" (in some currency), and the number of "cocadas" purchased is represented by the variable "n".
Then, the amount to be paid can be calculated using the formula
amount to be paid = p × n
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farmers use herbicides to limit the growth of weeds among their crops. do you think it would be appropriate to display these data in a histogram without first plotting them in a time plot? explain why or why not.
Whether to use a histogram or a time plot depends on the specific objective of your analysis. A histogram
is suitable for analyzing the distribution of herbicide usage, while a time plot is better for analyzing trends over time.
It would be appropriate to display these data in a histogram without first plotting them in a time plot if you are looking
to analyze the distribution or frequency of herbicide usage across different amounts or categories.
A histogram can provide a clear visualization of the distribution and help identify any patterns or trends in the data.
However, if your goal is to analyze the trend of herbicide usage over time, then it would be more appropriate to use a
time plot.
A time plot will show changes in the usage of herbicides over a specific time period and help identify any seasonal
patterns or trends in the data.
In summary, whether to use a histogram or a time plot depends on the specific objective of your analysis. A histogram
is suitable for analyzing the distribution of herbicide usage, while a time plot is better for analyzing trends over time.
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Write the point-slope form of the equation of the line that passes through the points (6, -9) and (7, 1). Include your work in your final answer. Type your answer in the box provided to submit your solution.
Therefore , the solution of the given problem of equation comes out to be 10x - y = 51 is the point-slope form of the equation of the line passing through the points (6, -9) and (7, 1).
Explain the equation.Variable words are frequently used in complex algorithms to show consistency between two arguments that are opposed to one another. Academic expressions called equations are used to show the equality of various academic figures. Take into account the details in the z + 7 proposals.
Here,
The equation for the line passing between the points (6, -9) and (7, 1) must be found in the point-slope form.
Using the equation m = (y2 - y1) / (x2 - x1), find the slope (m) of the line, where (x1, y1) and (x2, y2) are the coordinates of the two points.
=> (x1, y1) = (6, -9)
=> (x2, y2) = (7, 1)
=> m = (1 - (-9)) / (7 - 6)
=> m = 10 / 1 m = 10
Consequently, the line's slope is 10.
=> y - y1 = m(x - x1)
=> m = 10 (x1, y1) = (6, -9)
=> y - (-9) = 10(x - 6)
=> y + 9 = 10x - 60
=> 10x - y = 51
Therefore, 10x - y = 51 is the point-slope form of the equation of the line passing through the points (6, -9) and (7, 1).
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What is 2. 803 rounded to the nearest half
Answer: 3
Step-by-step explanation:
A line intersects the points (-3, 4) and
(-2, 3). What is the slope-intercept
equation for this line?
y = -x + [?]
The slope-intercept equation of line is -1 and equation will be y = -x - 1.
What is the slope?
m = (y2 - y1) / (x2 - x1) is the formula for calculating slope from two points on a line, (x1, y1) and (x2, y2). Here,
m = the line's slope
x1 is equal to the initial point's x-coordinate.
y1 is the first point's y-coordinate.
x2 is equal to the second point's x-coordinate.
The second point's x-coordinate is equal to y2.
x1 = -3, y1 = 4; x2= -2, y2=3
m = (3-4)/(-2 - (-3))
= -1 / (-2+3)
= -1/1
m = -1
Substitute the value in given equation:
y = -x + (-1)
y = -x - 1
Hence, the slope-intercept equation of line is -1 and equation will be y = -x - 1.
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Help needed as soon as possible
To find the volume of the solid generated when R is rotated about the horizontal line y=3, we can use the method of cylindrical shells.
The height of each cylindrical shell is the difference between the horizontal line y=3 and the upper function y=√x, which is 3-√x. The radius of each cylindrical shell is x, since R is being rotated about the horizontal line y=3. Thus, the volume of each cylindrical shell is given by:
dV = 2πx(3-√x) dx
Integrating this expression from x=0 to x=9, we get:
V = ∫(0 to 9) 2πx(3-√x) dx
= 2π∫(0 to 9) (3x- x√x) dx
= 2π [ (3/2)x^2 - (2/5)x^(5/2) ] (0 to 9)
= 243π/5
Therefore, the volume of the solid generated when R is rotated about the horizontal line y=3 is 243π/5 cubic units.
To find the volume of the solid generated when R is rotated about the vertical line x=-1, we can use the method of cylindrical shells again.
The height of each cylindrical shell is the difference between the right function y=√x and the left function y=x/3, which is √x - x/3.
The radius of each cylindrical shell is 1+x, since R is being rotated about the vertical line x=-1. Thus, the volume of each cylindrical shell is given by:
dV = 2π(1+x)(√x - x/3) dx
Integrating this expression from x=0 to x=9, we get:
V = ∫(0 to 9) 2π(1+x)(√x - x/3) dx
= 2π ∫(0 to 9) (√x + x√x - x^2/3 - x^(5/2)/3) dx
= 2π [ (2/3)x^(3/2) + (2/5)x^(5/2) - (1/6)x^3 - (2/21)x^(7/2) ] (0 to 9)
= 2438π/35
Therefore, the volume of the solid generated when R is rotated about the vertical line x=-1 is 2438π/35 cubic units.
Finally, since the cross sections perpendicular to the y-axis are squares, the volume of the solid can be found by integrating the area of each square cross section with respect to y. The area of each square is equal to the square of the function y=√x, since this is the upper function for R. Thus, the volume of the solid is given by:
V = ∫(0 to 9) (√x)^2 dy
= ∫(0 to 3) x dy
= [ (1/2)x^2 ] (0 to 9)
= 81/2
Therefore, the volume of the solid with square cross sections perpendicular to the y-axis is 81/2 cubic units.
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Two sides and an angle are given below . Determine whether the given information results in one triangle, two triangles, or no triangle at all. Solve any resulting triangle(s). a=8, b=2, A=70°
We can see that for c to be greater than 6, sin(C) must be greater than sin(70°). However, since sin(C) cannot be greater than 1, there are no possible values of C that satisfy this condition.
What is the sides and an angle?Based on the given information, we have:
[tex]a = 8[/tex] (length of side a)
[tex]b = 2[/tex] (length of side b)
[tex]A = 70^\circ[/tex] (angle A)
To determine whether the given information results in one triangle, two triangles, or no triangle at all, we can apply the triangle inequality theorem.
According to the triangle inequality theorem, the sum of the lengths of any two sides of a triangle must be greater than the length of the third side.
Let's check if the given sides a, b, and angle A satisfy the triangle inequality theorem:
[tex]a + b > c[/tex]
[tex]8 + 2 > c[/tex]
[tex]10 > c[/tex]
[tex]c > |a - b|[/tex]
[tex]c > |8 - 2|[/tex]
[tex]c > 6[/tex]
where c is the length of the third side.
From the above inequalities, we can see that c must be greater than 6 and less than 10 in order to form a triangle. However, we also know that [tex]A = 70^\circ[/tex], and the sum of the angles in a triangle is always 180°. So we can use the Law of Sines to find the length of side c:
[tex]sin(A) / a = sin(C) / c[/tex]
[tex]sin(70°) / 8 = sin(C) / c[/tex]
[tex]c = (8 \times sin(C)) / sin(70^\circ)[/tex]
Now we can find the possible values of c using the given information:
[tex]c = (8 * sin(C)) / sin(70^\circ)[/tex]
[tex]c = (8 \times sin(C)) / sin(70^\circ) > 6[/tex] (from triangle inequality)
Therefore, We can see that for c to be greater than 6, sin(C) must be greater than sin(70°). However, since sin(C) cannot be greater than 1, there are no possible values of C that satisfy this condition.
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Two sides and an angle are given. Determine whether the given information results in one triangle, two triangles, or no triangle. Solve any triangle that result triangle(s). a=8, b=2, A=70°
A washer and dryer cost a total of 924
. The cost of the washer is three times the cost of the dryer. Find the cost of each item.
Answer:
washer=693
dryer=231
Step-by-step explanation:
3x+x=924
4x=924
x=231
sketch the region in the plane consisitng of points whose polar coordinates satisfy the given conditions. 1
In summary, to sketch a region in the plane consisting of points whose polar coordinates satisfy the given conditions, we need to identify the range of values for the radius and angle that satisfy the conditions, plot points using these values, and connect them to form the region.
To sketch the region in the plane consisting of points whose polar coordinates satisfy the given conditions, we need to first understand what the conditions are. In this case, the conditions are not provided, so it's difficult to give a specific answer. However, generally speaking, polar coordinates represent a point in the plane using a radius and an angle. The radius is the distance from the origin to the point, and the angle is the angle formed between the positive x-axis and a line drawn from the origin to the point.
To sketch a region in polar coordinates, we need to identify the range of values for the radius and angle that satisfy the given conditions. We can then plot points in the plane using these values and connect them to form the region.
For example, if the conditions were that the radius must be greater than 2 and the angle must be between pi/4 and 3pi/4, we would plot points with polar coordinates (r, theta) where r > 2 and pi/4 < theta < 3pi/4. We would then connect these points to form the region.
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kristine wants to do hardwood flooring for her room. a floor plan of the room (in feet) is shown. how much hardwood flooring does she need? 29 ft2 28 ft2 30 ft2 36 ft2
The Hardwood flooring needs 82 square feet for a floor plan of the room (in feet) is length is 10 feet and the width is 9 feet Option B is the correct answer.
To determine how much hardwood flooring Kristine needs for her room, we can follow these steps:
Measure the length and width of the room in feet. From the floor plan, we can see that the length is 10 feet and the width is 9 feet.
Multiply the length and width to find the area of the room in square feet. Area = length x width = 10 x 9 = 90 square feet.
However, we need to account for any areas of the room where the flooring won't be installed, such as the closet. From the floor plan, we can see that the closet is 2 feet wide and 4 feet long, so its area is 2 x 4 = 8 square feet.
Subtract the area of the closet from the total area of the room to get the final amount of hardwood flooring needed. Final area = total area - closet area = 90 - 8 = 82 square feet.
Therefore, Kristine needs 82 square feet of hardwood flooring for her room.
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The question is -
Cristine wants to do hardwood flooring for her room. The floor plan of the room (in feet) is length is 10 feet and the width is 9 feet. how much hardwood flooring does she need?
a. 49 ft2
b. 82 ft2
c. 70 ft2
d. 66 ft2
Solve for b.
b= [?]
Please help!!!
Answer:
b = 93°
Step-by-step explanation:
We Know
A triangle is 180°
One angle of the triangle is 21.5°, and the other is 65.5°.
Find angle b, we take
180 - (21.5 + 65.5) = 93°
So, b = 93°
CAN SOMEONE PLEASE HELP ME WITH THIS :((
What is the value or arc PQ? Only enter numerical values.
The value of arc PQ is 110°
What is circumference of a circle?The circumference of a circle is the length of the 360 degree arc of that circle. Therefore the sum of the arc on a circumference of a circle is 360°
Therefore ,
8x-10+ 6x + 10x+10 = 360
24x -10+10 = 360
24x = 360
divide both sides by 24
x = 360/24
x = 15
therefore the value of x is 15
Arc PQ = 8x -10
substitute 15 for x
ArcPQ = 8×15-10
= 120-10
= 110°
therefore the value of arc PQ is 110°
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This square-based pyramid is made of wire.
The edges of the base all have length 3.07 cm.
The other edges all have length 6.93 cm.
Find the total length of wire.
Answer: 40cm
Step-by-step explanation:
3.07 x 4 = 12.28
6.93 x 4 = 27. 72
12.28 + 27.72 = 40cm
Answer:
40 cm
Step-by-step explanation:
A square-based pyramid is a three-dimensional geometric shape with a square base and four congruent triangular faces that meet at a single point called the "apex".
The edges of a square-based pyramid consist of 4 congruent slant edges and 4 congruent base edges. The slant edges form the sides of the triangular faces, and the base edges connect the vertices of the base.
Given the edges of the square base are 3.07 cm, and the slant edges are 6.93 cm, the total length of the wire is:
[tex]\begin{aligned}\sf Total\;length\;of\;wire&=\sf 3.07 \times 4+6.93 \times 4\\&=\sf 12.28+27.72\\&=\sf 40\; cm\end{aligned}[/tex]
Therefore, the total length of the wire is 40 cm.
Simplify (√5x³ × √9x⁶) ÷ √80x
Answer:
8150.46 % 8.94x
Step-by-step explanation:
{ (√5x³ }× √9x⁶) ÷ √80x
first brackets
(√125 × √531441) ÷ √80x
(√125 × √531441) ÷ √80x
(11.1803398875 x 729) % √80x
8150.46777799 % √80x
8150.46777799 % 8.94427191x
a penny, nickel, and dime are all flipped once. what is the probability that at least one coin comes up heads?
Answer: 25% chance
Step-by-step explanation: the chance is 25 % because theirs 3 coins each equaling 25 So, all 3 added will equal 75 % and then, if the 1 coin landed on heads while the other 2 coins lands on heads that would minus 25% and 50% and get 25%.
hopefully u consider me as a giga chad :)
Hey I have some work rate math problems, if anyone can help me solve them id appreciate it.
The owner of a house require that the house be painted in 32 hours (4 work days). Mr. Paint, a painting contractor, would need 40 hours (5 days) to paint the house alone. To make sure the house is painted in 32 hours, Mr. Paint hires an assistant. How long would the assistant need to paint the house alone? ( for question 1,2 & 3)
1- Let x represent the amount of time the assistant would need to paint the house alone. Write an expression that shows the hourly rate at which Mr. Paint and his assistant work together to paint the house.
2- Now write an equation that can be used to determine the rate at which the assistant works.
3- If we know that the assistant works at a rate that would take him 160 hours to finish the job alone, and Mr. Paint receives $40 an hour for the job, how much should he pay his assistant?
4- Now consider a different scenario. A type of swimming pool holds 100 gallons of water. One hose can fill the pool in 12 hours while another takes only 10 hours. How long will it take for the pool to be filled if both hoses are used?
5- Working alone, a landscaper could build a retaining wall in 38 hours, while his apprentice could build the wall in 62 hours. If t represents the number of hours it would take them to build the wall while working together, which equation is correct?
6- Every night after closing, the moat in the hippopotamus exhibit at a zoo is drained and cleaned. The zoo currently has one pipe that can drain the moat in 50 minutes. It is considering installing a second pipe to speed up draining. The table below shows different times that the new pipe might take to drain the moat alone. In each row of the table, fill in the number of minutes it would take for both pipes to drain the pool simultaneously. Round your answers to the nearest tenth of a minute, when necessary.
Answer:
Step-by-step explanation:
1. 1/40 + 1/x
2. 1/32 = 1/40 +1/x
3. $8 per hour
4. about 5.5 hours
5. 1/38 + 1/62 = t/x
6.
1. 16.7
2. 22.2
3. 26.2
4. 29.2
nice pfp
help please? I just need an answer. A clear explanation earns brainliest.
Answer:
9. You don't need to take action because the denominator is the same. You only operate on the numerator.
10. Use equivalent fractions that do have a shared denominator if the denominators are not the same. To accomplish this, you must identify the two denominators' least common multiples (LCM). Rename the fractions having a common denominator before adding those with different denominators.
Step-by-step explanation:
9. You don't need to take action because the denominator is the same. You only operate on the numerator.
10. Use equivalent fractions that do have a shared denominator if the denominators are not the same. To accomplish this, you must identify the two denominators' least common multiples (LCM). Rename the fractions having a common denominator before adding those with different denominators.
Raquel is building a shelf for her wall. The length of the wall is 11 feet 3 inches, the self will be built on the center of the wall 1/3 the length of the wall
1/3 of the length of Raquel's wall is 1 9/12 feet.
In this case, Raquel wants to position the shelf at the center of the wall, which means it will be located at a distance that is 1/3 of the length of the wall from each end. So, the first step is to find the length of 1/3 of the wall.
To do this, we can use fractions. We know that the wall is 11 feet 3 inches long, which we can write as 11 3/12 feet (since there are 12 inches in a foot). Now, we need to find 1/3 of this length.
To find 1/3 of 11 3/12 feet, we can divide the total length by 3. This gives us:
11 3/12 ÷ 3 = 3 9/12 feet
We can simplify this fraction by dividing both the numerator and denominator by 3, which gives us:
3 9/12 ÷ 3 = 1 9/12 feet
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Quadrilateral JKLM has vertices J(-1,3), K(2,0), L(-1,-6), and M(-4,-3). Determine whether each statement about quadrilateral JKLM is true or false.
(WRITE TRUE OR FALSE)
~1.) The quadrilateral is a parallelogram. {True/False}
~2.) Both pairs of opposite sides are congruent. {True/False}
~3.) The diagonals bisect each other. {True/False}
~4.) One pair of opposite sides is parallel. {True/False}
~5.) Both pairs of opposite aides is parallel. {True/False}
~6.) At least one pair of opposite sides is both parallel and congruent. {True/False}
The statements about the given quadrilateral are determined as follows:
1. False 2. False 3.True 4.False 5. False 6. False
What Statements are True about the Quadrilateral?1.) The quadrilateral is a parallelogram. False
To be a parallelogram, opposite sides must be parallel. We can find the slope of each side:
Slope of JK = (0 - 3) / (2 - (-1)) = -1
Slope of KL = (-6 - 0) / (-1 - 2) = 2
Slope of LM = (-3 - (-6)) / (-4 - (-1)) = 1
Slope of MJ = (3 - (-3)) / (-1 - 2) = 2/3
Since the opposite sides do not have the same slope, the quadrilateral is not a parallelogram.
2.) Both pairs of opposite sides are congruent. False
To be a parallelogram, opposite sides must be congruent. We can use the distance formula to find the length of each side:
Length of JK = √((2 - (-1))² + (0 - 3)²) = √(13)
Length of KL = √((-1 - (-1))² + (-6 - 0)²) = 6
Length of LM = √((-4 - (-1))² + (-3 - (-6))²) = √(13)
Length of MJ = √((-1 - 2)² + (3 - (-3))²) = 6
Since the opposite sides do not have the same length, the quadrilateral does not have congruent opposite sides.
3.) The diagonals bisect each other. True
To check whether the diagonals bisect each other, we can find the midpoint of each diagonal:
Midpoint of JL = ((-1 - 1)/2, (3 - 6)/2) = (-1,-1.5)
Midpoint of KM = ((2 - 4)/2, (0 - 3)/2) = (-1,-1.5)
Since the midpoints of JL and KM are the same point, (-1,-1.5), the diagonals bisect each other.
4.) One pair of opposite sides is parallel. False
As we determined in statement 1, none of the pairs of opposite sides are parallel.
5.) Both pairs of opposite sides are parallel. False
As we determined in statement 1, none of the pairs of opposite sides are parallel.
6.) At least one pair of opposite sides is both parallel and congruent. False
As we determined in statements 1 and 2, none of the pairs of opposite sides are both parallel and congruent.
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