Answer:
x=5
y=-2
Step-by-step explanation:
even though this looks like they want you to do it elimination ima do substation cause I like that better
2x-y=12
+y. +y
2x=12+y
-12 -12
2x-12=y
Now we can fill in y
3x+4(2x-12)=7
3x+8x-48=7
11x-48=7
+48. +48
11x=55
/11. /11
x=5
fill in X to find y
2(5)-y=12
10-y=12
-10. -10
-y=2
y=-2
hopes this helps please mark brainliest
Lol help quick pleaseeeeeeeeee
The answer to be entered in the boxes for the area model is 17, 0 and 17
How to find the division problem the area model represents?
An area model is a rectangular diagram or model used for solving multiplication and division problems, in which the quotient and divisor define the length and width of the rectangle
Given:
....60.....1.............
36|2160 | 36 | 17
2160 ÷ 36 = 60 R 0
36 ÷ 36 = 1 R 0
17 ÷ 36 = 0 R 17
Note: (0 x 36) + 17 = 17
Therefore, the answer to be entered in the boxes is 17, 0 and 17 respectively
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i need to find the diameter and the area of this equation[tex]A=\pi \frac{d}{2} x^{2}[/tex]
Answer:
Step-by-step explanation:
during the course of the basketball season, shawna made 67 out of 100 free throws. when we say that her probability of making a free throw during the playoffs is 0.67, what type of probability are we starting?
The type of probability are we starting will be relative frequency probability or the empirical probability,
What is probability?It is defined as the ratio of the number of favorable outcomes to the total number of outcomes, in other words, the probability is the number that shows the happening of the event.
Given that, Shawna made 67 out of 100 free throw attempts during the course of the basketball season. When we state that she has a 0.67 chance of making a free shot during the postseason,
The ratio of the number of times an event occurs to the total number of outcomes that occurred is known as relative frequency.
Thus, the type of probability are we starting will be relative frequency probability or the empirical probability,
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Mrs. Robinson made the table below showing the number of cells in a biology experiment after a number of days. Which type of function best models Mrs. Robinson’s data?
Days / Number of Cells
2 / 4
3 / 8
4 / 16
5 / 32
6 / 64
7 / 128
a) an exponential function
b) a quadratic function
c) an absolute value function
d) a linear function
The type of function best models Mrs. Robinson’s data is A. exponential function.
What is an exponential function?The formula f(x) = a^x defines an exponential function, where x is the input variable as an exponent. The exponential curve is determined by the exponential function and the value of x. Where an is greater than zero and less than one. x can be any actual number.
Mrs. Robinson created the table, which shows the number of cells in a biology experiment after a certain number of days. The independent variable, or x-value, in an exponential function is the exponent, while the base is a constant.
In this case, we can see that:
2 days = 2² = 4
3 days = 2³ = 8
4 days = 2⁴ = 16
This is an exponential function.
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22. A train travels 3 hours at 20km per
hour. How long will it take another
train to travel the same distance at
10km per hour?
(a) 6²/³ hours
(b) 6¹/2hours
(c) 6 hours
(d) 3 hours
(e) 2 hours
ans
6 hours will it take another train to travel the same distance .
What is speed?
Speed indicates the rate of movement of something or someone. If you know the distance traveled and the time it took, you may calculate an object's average speed. Speed is calculated as distance times speed.Average speed = Total distance/Total time
A train travels 3 hours at 20km per hour.
train travels 20 km in 1 hours.
then in 3 hours train travels = 3 * 20 = 60 km
total speed = 10 km/hr
t = distance/speed
= 60/10 = 6 hours
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R is inversely proportional to A.
R = 12 when A = 1.5
a) Work out the value of R when A = 5.
b) Work out the value of A when R = 9
The value of R when A equal 5 is 3.6 and the value of A when R equal 9 is 2 as R is varies inversely to A.
What is the value of R when A equal 5 and value of A when R equal 9?Proportional relationships are relationships between two variables where their ratios are equivalent.
If R is inversely proportional to A.
R ∝ 1/A, then
R = k/A
Where k is the proportionality constant.
Given that;
R = 12 A = 1.5Proportionality constant k = ?First, we determine the proportionality constant.
R = k/A
Plug in R = 12 and A = 1.5 and solve for k
k = R × A
k = 12 × 1.5
k = 18
a) The value of R when A = 5 will be;
R = k/A
R = 18 / 5
R = 3.6
b) The value of A when R = 9
R = k/A
R × A = k
A = k/R
A = 18 / 9
A = 2
Therefore, the value of A when R equal 9 is 2.
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he types at a rate of 30 words per minute is this stament a function or not a function
Please Help Me!
Find the value of x
Answer: 65°
Step-by-step explanation:
You can determine the total degree within a shape by using the formula 180°(n-2), where n is the number of sides of the shape. Thus, the total degree within the parallelogram is 360°.
Angles sum up to the total degree, meaning we need to add up all the angles we see and set them equal to the total degree. We have two (2x-15) and two x's.
2(2x-15) + 2x = 360
Distribute the 2 to (2x-15), you will get 4x - 30.
4x - 30 + 2x = 360
Add like terms, 4x + 2x to get 6x.
6x - 30 = 360
Add both sides by 30 to isolate the 6x, because we are trying to determine the value of x, we need to isolate the term.
6x = 390
Divide both sides by 6, and you are left with the value of x being 65°
At a real estate agency, an agent sold a house for $307,000. The commission rate is 5.5% for the real estate agency and the commission rate for the agent is 25% of the amount the real estate agency gets. How much did the agency make on the house? How much did the agent earn in commission?
The commission that thereal estate agency gets is $16885.
The commission that the agent gets is $76750
How to calculate the commission?The selling price for a house = $ 307,000
The commission rate for real estate agency = 5.5 %
The commission rate for the agent = 25 %
So, the commission which real estate agency gets:
= 5.5 % of $307,000
= 0.055 × $ 307,000
= $16885
The commission which agent get:
= 25% of $ 382,000
= 0.25 × $ 307,000
= $76750
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A plumber has a 36-inch pipe that he has to cut into two
pieces so that one piece is 8 in. longer than the other. Find
the length of each piece.
A plumber has a 36-inch pipe that he needs to cut into two pieces, one 8 inches longer than the other. Each piece's length is x = 14, while the other piece's length is 22.
What is meant by length?The measurement or extent of something from end to end is defined as length. In other words, it is the larger of the two or the highest of three geometrical shapes or objects' dimensions. A rectangle, for example, has length and breadth dimensions.Centimeters, meters, kilometers, inches, feet, yards, and other standard units of length measurement are some examples.A segment's length or the dimensions of a room are examples of length measurements. Distance is the distance between two objects, such as two cities or two points. There will never be a negative value for length or distance.Therefore,
let x = the first piece and x+14 is the second.
2x + 8 = 36
2x = 28
x = 14, the other piece is 22
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a random variable is normally distributed with a mean of 25 and a standard deviation of 5. if an observation is randomly selected from the distribution, what value will 15% of the observations be below?
the 2 values X(19.8,30.2) is value will 15% of the observations be below .
by hypothesis .
What is hypothesis ?
A hypothesis is an assertion, a notion put up for the purpose of debating and then examined to discover if it might be true. Prior to conducting any relevant research, other than a brief background review, the hypothesis is developed using the scientific method.Here, Mean(\mu) and Standard Deviation (\sigma)= 5. You need to find the 2 values of which the smallest has 15% of the values below it i.e (Z<x)= 0.15 and the largest has 15% of the values above it i.e(Z>y)= 0.15.
Now we need to refer to the Z tables and see which value of x corresponds to 0.15, and we see that -1.04 is = 0.149 \sim 0.15
Now we know that the Z value is given by Z = X - μ/σ
Substituting we get
-1.04= (X-25)/5
therefore -5.2= X-25 or X= 19.8
Now let us get the value of X for (Z>y)=0.15`. Since Z tables give values for Z<a only, hence we can write that
Z>y=0.15 is the same as Z<y= 1-0.15= 0.85. We now check the Z tables and see which value of Z corresponds to 0.85, and we get 0.850 = +1.04
Again, substituting Z in the equation Z = X - μ/σ
we get
+1.04= (X-25)/5
Therefore 5.2= X-25, therefore X= 30.2
From the 2 values X(19.8,30.2)
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can someone help pls
Answer:
4 hostel rooms
Step-by-step explanation:
okay so for this all you need to do is read the chart
go to 4-7 and read across to see how many hostel rooms have this many guests go to 20-23 and read across to see how many hostel rooms have this many guests there are 5 rooms with 4-7 guests (because 5 is halfway between 4 and 6 on the chart)there is only 1 room with 20-23 guests (because 1 is halfway between 0 and 2)work out the difference: 5-1 = 4in how many ways can you put 8 distinguishable balls into 3 distinguishable boxes such that each box has at least one ball?
We can put 8 distinguishable balls into 3 distinguishable boxes such that each box has at least one ball in 21 ways.
Given, that there are 3 boxes and we have to put 8 balls in them such that no box is empty.
Let, a + b + c = 8, where a , b , c represent three different boxes.
The equation be reduced by allotting 1 ball to each box so that no box remains empty.
Hence, a + b + c = 5
Now, using the formula of "no. of ways in which 'n' objects can be grouped into 'r' groups" i.e. C(n+r-1 , r-1)
So, the required number of ways = C(5+3-1 , 3-1) = C(7 , 2)
Calculating, C(7 , 2) = (7×6)/2 = 21
Hence, we can put 8 distinguishable balls into 3 distinguishable boxes such that each box has at least one ball in 21 ways.
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A dam has a floodgate. When it is open, it lets out 10,000 gallons of water per minute.
How many gallons of water will it let out in 10 minutes?
A. 1,000
B. 10,000
C. 100,000
D. 1,000,000
Answer: C. 100,000 gallons
Step-by-step explanation:
10,000 gallons a minute.
10 minutes.
10,000 x 10 = 100,000.
Gallons: 10,000 20,000 30,000 40,000 50,000 60,000
Minutes: 1 2 3 4 5 6
... 70,000 80,000 90,000 100,000
... 7 8 9 10
what is the probability that you will receive at most 30 winning tickets? (round to four decimal places.) 0.5484 what is the probability that you will receive more than 30 winning tickets? (round to four decimal places.) 1 what is the probability that you will receive fewer than 10 winning tickets? (round to four decimal places.) 0.2206 what is the probability that you will receive at least 10 winning tickets? (round to four decimal places.
Normal distributions are frequently employed in the natural and social sciences to describe real-valued regressors with uncertain distributions, normal distributions are essential to statistics.
The central limit theorem is one reason they are significant.
This claim argues that, in some circumstances, the average of many samples (observations) of a random variable with finite variance and mean is itself a random variable, whose distribution tends to become normal with an increase in sample size.
Because of this, distributions of physical quantities that are meant to be the culmination of multiple separate processes, such as error margins, frequently resemble normal distributions.
Only the normal distribution has additional cumulants after the first two that are zero. It is also the continuous distribution with the highest level of entropy for a given mean and variance.
Assuming that the mean and variance are finite, Geary has shown that the normal distribution is the only distribution in which the mean and variance calculated from a collection of independent drawings are independent of one another.
The normal distribution is a form of elliptical distribution. The normal distribution is symmetric about its mean and non-zero over the whole real line.
Consequently, it could not be an appropriate model for variables that are inherently positive or highly skewed, such as a person's weight or the value of a share.
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Let's find 1/10 + 1/2
First write the addition so the fractions have denominator 10. Then add
Answer:
3/5
Step-by-step explanation:
Given problem,
→ (1/10) + (1/2)
Let's solve the problem,
→ (1/10) + (1/2)
→ (1/10) + (5/10)
→ 6/10
→ 3/5 {simplest form}
Thus, answer is 3/5.
Solve by factorisation
2x2 + 3x - 20 = 0
Can somebody help me on this please
Since it is labeled that this triangle has two equal sides, it is isosceles. Isosceles triangles' acute angles are always congruent, so we can infer that there are two angles with a measurement of 29 degrees. Knowing that all of the angles in a triangle add up to 180 degrees, we can set up this equation:
2*29 + 11x - 65 = 180
58 + 11x - 65 = 180
-7 + 11x = 180
11x = 187
x = 17
Knowing that "x = 17" we can find the measurement of the obtuse angle:
11*17 - 65
= 187 - 65
= 122
Find an equation, in slope-intercept form, that passes through point (-2, 2) with slope -2.
[A] y = -2x-2 [B] y = 2x-2
[C] y = 2x-4 [D] y = -2x-4
The equation of a line on a point (-2,2) is y = -2x-2. That option A is correct.
Here we have to find the equation of a line.
The given data:
Point = ( -2, 2)
Slope(m) = -2
Equation of a line:
y = mx + c
Now putting the values as
y = 2
x = -2
m = -2
We will get the y-intercept.
So we have:
2 = -2 × -2 + c
c = 2 - 4
= -2
So, y = -2x -2
Therefore we get the equation of line as y = -2x -2.
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What is an equation of the line that passes through the points (-7, 3) and (5, 3)?
the equation of the line passing through the given points is y = 3
What is an equation of the line?
An expression which is satisfied by every point on the line is known as equation of the line. generally it is given in y = mx + c form where m is the slope and c is the y-intercept
We are given two point (-7,3) and (5,3)
We first find the slope of the lines passing through the given points
Slope = [tex]\frac{3-3}{5+7}[/tex]
Slope = 0
Substituting the value in the equation we get
y = c
Now the value of y in both the cases is 3
Substituting that we get c = 3
Hence y = 3 is the required equation of the line
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Please solve the following exponential equation
[tex] \frac{4}{2 {}^{x } } = 64 {}^{x} [/tex]
x = 2/7
see explanation in image
Marie has $180 in a savings account in week 1. She plans to deposit $12 each following week. Assuming that she does not withdraw any money from her account, what will her balance be in week 20?
The balance in Marie saving account in week 20 will be $408 .
In the question ,
it is given that
the amount in Marie's saving account in week 1 is $180 .
amount of money deposited every week is = $12 .
to find the balance in week 20 means , she deposited money for 19 weeks .
the amount deposited in 19 weeks = 19 × 12 = $228
the equation to represent the balance after w weeks = 180 + 12*w
putting w = 19 in the equation , we get
the balance in saving account in week 20 = 180 + 12*19
the balance in week 20 = 180 + 228
= $408
Therefore , The balance in Marie saving account in week 20 will be $408 .
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Which methods of paying for college do not require repayment? Check all that apply.
how to solve/fhfhfhfhfhfhf
Answer:
b
Step-by-step explanation:
the right side base angle and 80° are vertically opposite angles and are congruent, both 80°
the exterior angle of a triangle is equal to the sum of the 2 opposite interior angles.
123° is an exterior angle of the triangle , then
x + 80 = 123 ( subtract 80 from both sides )
x = 43
ana is making treat bags to give to her 10 students. she puts x number of gum and 4 pieces of candy in each bag. after she was done she had used a total of 60 pieces. how many pieces of candy did each bag get?
Each bag got 2 pieces of gums and 4 pieces of candies.
Given, that
Ana is making treat bags to give to her 10 students.
She puts x number of gum and 4 pieces of candy in each bag.
She had used a total of 60 pieces.
Now, as she puts 4 pieces of candy in each bag and she prepare total 10 bags.
So, She used total 4×10 = 40 candies
Now, if she used 60 pieces out of which 40 pieces are of candies
Then, 60 - 40 = 20 pieces
20 pieces will be of gums.
So, she puts total 20 pieces of gums in 10 bags
Hence, in each bag she puts 20/10 pieces of gums i.e. 2 pieces of gums
So, each bag got 2 pieces of gums 4 pieces of candies.
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Simplify each expression.
1) 7w + 2w - 6w
2) 9x - 3x + 2x 3) 8p + 3p - p
4) 6b-3b+5b
The simplified expressions for the questions will be, 1) 3w, 2) 8x, 3) 10p, 4) 8b.
The simplification of an algebraic expression generally means breaking the equation into a smaller form for easier calculation with the help of formulas or using the rule of BODMAS.
Here, all the questions can be solved by using the BODMAS rule.
1) 7w + 2w - 6w
= (7w + 2w) - 6w
= 9w - 6w
= 3w.
2) 9x - 3x + 2x
= (9x + 2x) -3x
= 11x - 3x
= 8x.
3) 8p + 3p - p
= (8p + 3p) - p
= 11p - p
= 10p.
4) 6b - 3b + 5b
= (6b +5b) - 3b
= 11b -3b
= 8b.
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Step-by-step explanation:
[tex]7w + 2w - 6w \\ 9w - 6w \\ = 3w[/tex]
[tex]9x - 3x + 2x \\ 6x + 2x \\ = 8x[/tex]
[tex]8p + 3p - p \\ 11p - p \\ = 10p[/tex]
[tex]6b - 3b + 5b \\ 3b + 5b \\ = 8b[/tex]
The formula D = 401t + 5940 can be used to approximate the total average credit card debt in a U.S. household (in dollars) t years after 1995. Use this formula to predict what the total average credit card debt will be in the year 2028. In the year 2028, the total average credit card debt for a U.S. household will be $
Step-by-step explanation:
The formula D = 401t + 5940 can be used to approximate the total average credit card debt in a U.S. household (in dollars) t years after 1995. Use this formula to predict what the total average credit card debt will be in the year 2028.
2028 - 1995 = 33 years, so t = 33
D = 401t + 5940
D = 401(33) + 5940
D = 13,233 + 5940
D = 19,173
Answer: In the year 2028, the total average credit card debt for a U.S. household will be $19,173
Find the slope and reduce.
P=(-8, 3) Q=(-6, 2)
Slope
=
Answer:
2-3/-6-(-8)
= -1/2
The sum of thrice a number and 5 is greater than or equal to the sum of twice a number and 1. Write down the inequality and solve it..
Answer:
May be helpful.
thx.......
Simplify.
ab2−−−√+39ab2−−−−√−34ab2−−−−√
Assume all variables are nonnegative.
Answer:In this item, I take it that we are to get the cube root of the given expression, -64x6y9. First, we look into the numerical coefficient, this is the product when -4 is multiplied to itself three times as shown below.
-64 = (-4)(-4)(-4)
Then,
x6 = x2 (x2) (x2)
and,
y9 = (y3)(y3)(y3)
If we take the cube root, we consider only one item per product. Thus, the answer is,
-4x²y³
Step-by-step explanation: