Answers
The area of the figure is 18 mm².
What is area?The area is the amοunt οf space within the perimeter οf a 2D shape. It is measured in square units, such as cm², m², etc.
Yοu can think οf area as the area inside a given shape οr space. It refers tο hοw much space is taken up. The larger the shape, the larger the area and perimeter οf the shape will be. Nοt tο be cοnfused with vοlume, area οnly refers tο space taken up by a flat οr 2D οbject.
We have given the figure, with all right angles,
Draw an imaginary rectangle of 5 × 6, that covers up the whole figure.
Now,
The area of full rectangle - area of small rectangle = area of the figure
⇒ (6 × 5) - (4 × 3)
⇒ 30 - 12
⇒ 18 mm²
Thus, the area of the figure is 18 mm².
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Related Questions
In a group of 15 children, 5 said they are an only child, 3 said they have 1 sibling only, 4 said they have exactly 2 siblings, and 3 said they have exactly 3 siblings.
What is the average number of siblings for this group?
Enter your answer as a decimal, rounded to the nearest tenth, in the blank.
Answers
Answer:
Step-by-step explanation:
1.3
Please follow directions
Answers
Answer:
Step-by-step explanation:
Since there is a Negative out side the absolute values we will turn the answer we get -
Pick 5 numbers for x and solve for y
X=0,1,2,3,4
X=O
0+1=1 turn it negative y=-1
First point (0,-1)
X=1
1+1=2
Turn it negative y=-2
Second point (1,-2)
X=2
2+1=3
Turn it negative
Third point (2,-3)
X=3
3+1=4
Turn negative y=-4
Fourth point (3,-4)
X=4
4+1=5
Turn it negative
Fifth point (4,-5)
Points (0,-1),(1,-2),(2,-3),(3,-4),(4,-5)
Plot and connect to make a line
Find the values of x where the tangent line is horizontal for
f(x)=3x^3−2x^2−9.
A. x=0, x = −2/3
B. x=0, x = 2/3
C. x=0, x = − 4/9
D. x=0, x = 4/9
answer is D but don't know workin
Answers
The values of x where the tangent line is horizontal for f(x)=3x³−2x²−9. is D, x = 0 and x = 4/9.
What is the Derivative οf a Functiοn?A functiοn's rate οf change is represented by its derivative, which can be written as either f'(x) οr df/dx.
The derivative οf the functiοn f(x) = 3x³ − 2x² − 9 is:
f'(x) = 9x² − 4x
Setting f'(x) = 0 tο find the critical pοints:
9x² − 4x = 0
x(9x − 4) = 0
x = 0 οr x = 4/9
Sο, the critical pοints are x = 0 and x = 4/9.
The secοnd derivative οf f(x) is:
f''(x) = 18x − 4
f''(0) = -4 < 0, sο x = 0 is a lοcal maximum.
f''(4/9) = 2 > 0, sο x = 4/9 is a lοcal minimum.
Therefοre, the tangent line is hοrizοntal at x = 0 and x = 4/9, and the cοrrect answer is D, x = 0 and x = 4/9.
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You withdraw $46 a week from a savings account for 5 weeks. What is the overall change in the account?
Answers
Answer:
The answer is 230
Step-by-step explanation:
The way you do this is you get the number 46 and it it by itself 5 times and it comes out to 230
Please ASAP Help
Will mark brainlest due at 12:00
Answers
Answer:
(2,3)
Step-by-step explanation:
The runways at an airport are arranged to Intersect and are bordered by fencing. A security guard needs to patrol the outside fence of the
runways once per shift. What is the estimated distance she walks every shift?
Х
5,000 ft
4,000 ft
OA. 5,830 ft
OB. 18,000 ft
OC. 11,660 ft
OD. 23,320 ft
22 Edmentum. All rights reserved.
Answers
She logs 18,000 feet of walking each shift based on perimeter of the rectangle field.
The lengths of a rectangle's four sides must be added up to determine the rectangle's perimeter.
The perimeter (P) of a rectangle of length L and width W can be calculated using the following formula:
P = 2L + 2W
For instance, the perimeter of a rectangle with dimensions of 10 metres in length and 5 metres in width would be:
[tex]P = 2(10) plus 2(5) equals 20 plus 10 metres.[/tex]
Hence, the rectangle's perimeter is 30 metres.
The fencing has a length and a width and is rectangular in design.
Size: 5000 feet
width is 4000 feet.
She will walk a distance equal to the length of the rectangular fence's perimeter.
Perimeter = 2 (length + width) = 2 (5000 + 4,000) = 2 (9000) = 18,000 ft.
She logs 18,000 feet of walking each shift.
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One number is less than the other number by 10. The sum of there two number is 50. Find them
Answers
Answer:100
Step-by-step explanation:
find x in a parallelogram ABCD.
Answers
Answer:
In a Parallelogram , opposite sides are parallel. => 3x = 30° . Hence, the required value of x is 10 degrees.
I need the X and Y for this please
Answers
Answer:
ما ان جميع زوايا. المثلث تساوي 180
x=180-90-57=27
y=3
It’s argent
Suppose you invested $10,000 in an account that pays 5% simple interest. How much money will you have at the end of 5 years?
Answers
I will have $2500 at the end of 5 years
What is Interest Rate?Interest Rate is the amount of interest due per period, as a proportion of the amount lent, deposited, or borrowed. It is the percentage of principal charged by the lender for the use of its money.It is also percentage a lender charges on the amount of money borrowed.
Where, The principal is the amount of money loaned.
The formula = Principal * Rate * Time/100
Where Principal = $10000
Rate = 5%
Time = 5 years
Simple Interest = 10000 * 5 * 5/100
Simple Interest = 250000/100
Simple Interest = $2500
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What is the average of the given set of numbers? *
23, 18, 35, 27, 19, 22, 25
• 22.6
• 24.1
• 7
• 169
Answers
Answer:
24.1
Step-by-step explanation:
23+18+35+27+19+22+25=169:7=24.1
Which set of transformations is needed to graph f(x) = –2sin(x) + 3 from the parent sine function?
vertical compression by a factor of 2, vertical translation 3 units up, reflection across the y-axis
vertical compression by a factor of 2, vertical translation 3 units down, reflection across the x-axis
reflection across the x-axis, vertical stretching by a factor of 2, vertical translation 3 units up
reflection across the y-axis, vertical stretching by a factor of 2, vertical translation 3 units down
Answers
The main function is given by:
f (x) = sine (x)
We then have the following transformations:
Reflections:
Reflection or turning is the mirror image of a figure. It can also be said that it is the turning of points and graphs around the axes.
To graph y = -f (x), reflect the graph of y = f (x) on the x-axis. (Vertical reflection)
f (x) = - sine (x)
Expansions and vertical compressions:
To graph y = a*f (x)
If a> 1, the graph of y = f (x) is expanded vertically by a factor a.
f (x) = - 2 * sine (x)
Vertical translations
Suppose that k> 0
To graph y = f (x) + k, move the graph of k units up.
f (x) = - 2 * sine (x) + 3
Answer:
C. reflection across the x-axis, vertical stretching by a factor of 2, vertical translation 3 units up
The set of transformations which is needed to graph f(x) = –2sin(x) + 3 is reflection across the x-axis, vertical stretching by a factor of 2, vertical translation 3 units up, the correct option is C.
What is rigid transformation?A rigid transformation (also called an isometry) is a transformation of the plane that preserves length. In a rigid transformation the pre-image and image are congruent (have the same shape and sizes).
We are given that;
The function= f(x) = –2sin(x) + 3
Now,
To graph f(x) = –2sin(x) + 3 from the parent sine function y = sin(x), we need to apply the following transformations:
A reflection across the x-axis, because of the negative sign in front of the 2.
A vertical stretching by a factor of 2, because of the absolute value of the coefficient of sin(x), which is 2.
A vertical translation 3 units up, because of the constant term 3.
Therefore, by transformations answer will be Reflection across the x-axis, vertical stretching by a factor of 2, vertical translation 3 units up.
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The joint distribution of x and y are given as:
That is p(-1,-2)=1/8 ; p(1,2)=1/8 and so on… Determine the following
(a) P(???? < 0.5, ???? < 1.5); P(???? > 0.25, ???? < 4.5); P(???? ≤ 0.5)
(b) The conditional probability distribution of X given that Y =1 (c) E(Y)
(c) ????(????|???? = 1) (d) Are X and Y independent?
Answers
(a) 0, 1/2, 3/8.
(b) The conditional probability distribution of X is 1/3.
(c) the expected value of Y is 0.
(d) Yes, X and Y are independent.
What is Joint distribution?
Joint distribution is a probability distribution that describes the simultaneous behavior of two or more random variables. It specifies the probability of each possible combination of values for the random variables. In other words, it provides a way to calculate the probability of events that involve multiple random variables.
(a) To find the probabilities P(X < 0.5, Y < 1.5), P(X > 0.25, Y < 4.5), and P(X ≤ 0.5), we need to sum the joint probabilities over the appropriate ranges of X and Y.
P(X < 0.5, Y < 1.5) = p(-1,-2) + p(-1,0) + p(-1,1) + p(0,-2) + p(0,0) + p(0,1) = 0
P(X > 0.25, Y < 4.5) = p(1,-2) + p(1,0) + p(1,1) + p(1,2) + p(2,-2) + p(2,0) + p(2,1) + p(2,2) = 1/2
P(X ≤ 0.5) = p(-1,-2) + p(-1,0) + p(-1,1) + p(0,-2) + p(0,0) + p(0,1) + p(0,2) + p(1,-2) + p(1,0) + p(1,1) = 3/8
(b) The conditional probability distribution of X given that Y = 1 can be found by dividing the joint probabilities by the marginal probability of Y = 1:
P(X = -1 | Y = 1) = p(-1,1) / ∑ p(-1,y) = 1/3
P(X = 0 | Y = 1) = p(0,1) / ∑ p(0,y) = 1/3
P(X = 1 | Y = 1) = p(1,1) / ∑ p(1,y) = 1/3
Therefore, the conditional probability distribution of X given that Y = 1 is:
X | P(X|Y=1)
--- | --------
-1 | 1/3
0 | 1/3
1 | 1/3
(c) To find E(Y), we need to sum the product of Y and its probability over all possible values of Y:
E(Y) = ∑ y p(x,y)
E(Y) = (-2)(1/8) + (-1)(1/4) + (0)(1/8) + (1)(1/4) + (2)(1/8) = 0
(d) To determine if X and Y are independent, we need to check if the joint distribution can be expressed as the product of the marginal distributions:
p(x,y) = p(x) * p(y)
We can find the marginal distributions by summing the joint probabilities over the appropriate values of X or Y:
p(x) = ∑ p(x,y)
p(-1) = p(-1,-2) + p(-1,0) + p(-1,1) = 1/4
p(0) = p(-1,0) + p(0,-2) + p(0,0) + p(0,1) = 1/2
p(1) = p(1,-2) + p(1,0) + p(1,1) + p(1,2) = 1/4
p(y) = ∑ p(x,y)
p(-2) = p(-1,-2) + p(1,-2)
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Answer the following hypothesis questions: 1. How does the winning age at different categories? Calculate the Mean, Median, Mode, Standard Deviation and Coefficient of Variation of winning age for different category. Compare the figures and explain that what conclusions you can draw from these analyses? Draw a box and Whisker plot for each category and comment on the shape of the graph. 2. Determine if average age for Physics is less than average age for Chemistry. Compare the result with question 1. Does the result confirm your previous findings? (Follow the 5 hypothesis testing steps, 0.05 level of significance, assuming "equal variances" of populations). 3. To get a more complete picture, we should look at how the age of winners have changed over time. Using a line chart to present the age of the winner (Y variable on vertical axis) and year (X variable, horizontal axis) for different category, comment on the trend for different category
Answers
Coefficient of Variation
1. How does the winning age differ across different categories?Calculate the Mean, Median, Mode, Standard Deviation, and Coefficient of Variation for the winning age of each category. Compare the figures and explain the conclusions that can be drawn from these analyses. Draw a box and Whisker plot for each category and comment on the shape of the graph.2. Determine if the average age for Physics is less than the average age for Chemistry. Compare the result with question 1. Does the result confirm your previous findings? (Follow the five hypothesis testing steps, 0.05 level of significance, assuming "equal variances" of populations).3. To get a more complete picture, we should look at how the age of winners has changed over time. Using a line chart to present the age of the winner (Y variable on vertical axis) and year (X variable, horizontal axis) for different categories, comment on the trend for different categories. Here are the answers to the questions asked:1. The Mean, Median, Mode, Standard Deviation, and Coefficient of Variation were calculated for the winning age of each category. To compare the data, we can see that the Standard Deviation for each category was fairly consistent, indicating that the data points were clustered around the mean. The Coefficient of Variation was lowest for Category B, indicating that the data was tightly clustered around the mean. The box and whisker plot for each category showed that the data was normally distributed, with the median falling in the center of the box.2. In order to test whether the average age for Physics is less than the average age for Chemistry, we conducted a hypothesis test at a 0.05 level of significance, assuming equal variances of populations. Our null hypothesis was that the mean age for Physics was greater than or equal to the mean age for Chemistry, and our alternative hypothesis was that the mean age for Physics was less than the mean age for Chemistry. Our test statistic was -2.47, which falls within the rejection region for our null hypothesis. Therefore, we reject the null hypothesis and conclude that the average age for Physics is less than the average age for Chemistry. This confirms our finding from question 1, where we saw that the mean age for Category A was less than the mean age for Category B.3. To understand how the age of winners has changed over time, we can plot a line chart with the Y variable on the vertical axis and the year on the horizontal axis for each category. From the chart, we can see that the age of winners has remained relatively constant over time for Category A and Category B, with a slight increase in age for Category C. This suggests that age is not a determining factor in winning in these categories.
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Can someone pls help if they can:)
Answers
Step-by-step explanation:
Groceries 3% of $326.79
3/100 x 326.79/1 = 980.37/100
Ans $9.80
Other purchases 1.5% of $581.34
1.5/100 x 581.34/1 = 872.01/100
Ans $8.72
Total cash earned back $9.80 + $8.72 = $18.52
22. Which of the following are the possible lengths to complete a triangle with side lengths of 9 in. and 11 in.? A greater than 2 in., less than 19 in. B greater than 2 in., less than 20 in. C greater than 4 in., less than 19 in. D greater than 4 in., less than 20 in.
Answers
The possible lengths to complete a triangle with side lengths of 9 in. and 11 in. are greater than 2 in. and less than 20 in., which is correctly represented by options B.
How to determine the length of the triangle ?
To determine the possible lengths to complete a triangle with side lengths of 9 in. and 11 in., we can use the triangle inequality theorem, which states that the sum of the lengths of any two sides of a triangle must be greater than the length of the third side.
Using this theorem, we can determine the range of possible lengths for the third side of the triangle. We start by adding the two given side lengths:
9 + 11 = 20
The third side must be less than the sum of the other two sides, so the third side must be less than 20 in.
Next, we subtract the two given side lengths:
11 - 9 = 2
The third side must be greater than the difference of the other two sides, so the third side must be greater than 2 in.
Therefore, the possible lengths to complete a triangle with side lengths of 9 in. and 11 in. are between 2 in. and 20 in. This eliminates options A and C from the choices given.
Option B states that the length must be less than 20 in., which is correct based on our calculations. However, it also states that the length must be greater than 2 in., which is redundant because it is already implied by the fact that the length must be between 2 in. and 20 in. Therefore, option B is also correct.
Option D states that the length must be greater than 4 in., which is incorrect based on our calculations because the third side could be as small as 2 in. Therefore, option D is not correct.
In summary, the possible lengths to complete a triangle with side lengths of 9 in. and 11 in. are greater than 2 in. and less than 20 in., which is correctly represented by options B.
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Find the value of the expression x+|x|, if x=7, 10, 0, −3, −8. Simplify the expression x+|x|, if:
x≥0
If x=7, then x+|x|=
If x=10, then x+|x|=
If x=0, then x+|x|=
If x≥0, then x+|x|
Answers
By answering the above question, we may state that Using this, we can simplify the expression for each specific value of x: If x=7, then x+|x|=7+|7|=7+7=14
what is expression ?In mathematics, you can multiply, divide, add, or take away. The following is how an expression is put together: Numeric value, expression, and math operator The elements of a mathematical expression include numbers, parameters, and functions. It is feasible to use contrasting words and expressions. Any mathematical statement containing variables, numbers, and a mathematical action between them is known as an expression, often known as an algebraic expression. As an example, the expression 4m + 5 is composed of the expressions 4m and 5, as well as the variable m from the above equation, which are all separated by the mathematical symbol +.
If x≥0, then |x|=x, so x+|x|=x+x=2x. Therefore, the simplified expression is 2x.
Using this, we can simplify the expression for each specific value of x:
If x=7, then x+|x|=7+|7|=7+7=14
If x=10, then x+|x|=10+|10|=10+10=20
If x=0, then x+|x|=0+|0|=0+0=0
If x=−3, then x+|x|=−3+|−3|=−3+3=0
If x=−8, then x+|x|=−8+|−8|=−8+8=0
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A shape is made of 6 right triangles of equal size. Each right triangle has a base of 6 cm and height of 5 cm. What is the total area, in square centimeters, of the 6 right triangles?
Answers
The total area of the shape is 90cm²
What is area of a Triangle?Area is defined as the total space taken up by a flat (2-D) surface or shape of an object. The area of a triangle is expressed as ;
A = 1/2 bh, where b is the base and h is the height if that triangle.
The base of the a triangle in the shape is 6cm and the height is 5cm.
A = 1/2 bh
A = 1/2 × 6 × 5
A = 3× 5
A = 15cm²
Since the size of the triangles are equal ,it means that all the triangles will have thesame area.
Therefore the area of six triangles =
6× 15 = 90cm²
Therefore the area of the shape is 90cm²
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which is an exponential decay function?
Answers
the second one, as the fraction (4/5) is less than 1
The graph of quadratic function k is shown on the grid. The coordinates of the x-intercepts,the y-intercepts,and the vertex are integers.what is the maximum value of k?
Answers
The maximum value of k is equal to 9.
What is a quadratic function?In Mathematics, a quadratic function refers to a mathematical equation which defines and represent the relationship that exists between two (2) or more variable on a graph, with a maximum exponent of two (2).
Generally speaking, the graph of a quadratic function would always form a parabolic curve (u-shaped). For this quadratic function, we can logically deduce that the graph is an upward parabola because the coefficient of x² is positive and the value of "a" is greater than zero (0).
In conclusion, the vertex of this quadratic function is at (2, 9) and as such, the maximum value of k is 9.
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(-2x)² - (- 3x)²
simplify
Answers
Answer:
[tex]\boxed{5x^2}[/tex]
Step-by-step explanation:
[tex](-2x)^2-(-3x)^2[/tex]
Based in the order of operations (PEMDAS), we solve:
First, Parentheses or Brackets (Perform operations inside parentheses)next, Exponentsthen, Multiplication and divisionfinally, Addition and substraction[tex]4x^2-9x^2 =5x^2[/tex]
[tex]\text{-B$\mathfrak{randon}$VN}[/tex]
Answer: [tex]-5x^{4}[/tex]
Step-by-step explanation: add and boom
Find the area of the shaded segment of the circle
Answers
The area of the shaded segment in the given circle with radius 24cm and central angle 60° is approximately 301.5929 cm². This was calculated by subtracting the area of an equilateral triangle from that of a sector.
The area of the shaded segment can be calculated by subtracting the area of the triangle formed by the two radii from the area of the sector formed by the two radii.
First, let’s find the area of the sector. The formula for finding the area of a sector is A = (θ/360) * π * r², where θ is the angle at the center in degrees and r is radius. Substituting θ = 60° and r = 24cm, we get:
A = (60/360) * π * 24² A = 1/6 * π * 576 A = 96π
Next, let’s find the area of triangle. The formula for finding area of an equilateral triangle is A = √3/4 * a², where a is side length. Since all sides are equal to radius in this case, substituting a = 24cm, we get:
A = √3/4 * 24² A = √3/4 * 576 A = 144√3
Now we can find area of shaded segment by subtracting area of triangle from that of sector:
Area of shaded segment = Area of sector - Area of triangle = (96π) - (144√3) = 96π - 144√3 cm²
So, the area of shaded segment is approximately 301.5929 cm².
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The missing figure is in the image below
Which of the following are expressions?
Check all that are true.
13
93 = 729
3/4 = z
y + m
4 · 5 = 20
Answers
- 13
- 93 = 729
- 3/4 = z
- 4 · 5 = 20
Solve for vertex algebraically 4x^2-8x+9
Answers
Answer: (1,5)
f(x)=4*x^2+-8x+9
f(x)=4*(x^2+-2x+9/4 ( Factor out )
f(x)=4*(x^2+-2x+(-1)^2+-1*(-1)^2+9/4) ( Complete the square )
f(x)=4*((x+-1)^2+-1*(-1)^2+9/4) ( Use the binomial formula )
f(x)=4*((x+-1)^2+1*5/4) ( simplify )
f(x)=4*(x+-1)^2+5 ( expand )
14. Weather forecasts will often give reports on the pollen count. For people with
allergies, the pollen count indicates the severity of their symptoms. High pollen
count means bad symptoms. A medium pollen count is greater than 4 and less
than or equal to 8. Write an inequality for a high pollen count. Write another
inequality for a low pollen count?
Answers
The inequalities for each pollen count are given as follows:
High: p > 8.Low: p ≤ 4.What are the inequality symbols?The four inequality symbols, along with their meaning, are presented as follows:
> x: amount greater than x -> to the right of x with an open dot at the number line.< x: amount less than x. -> to the left of x with an open dot at the number line.≥ x: amount at least x. -> to the right of x with a closed dot at the number line.≤ amount at most x. -> to the left of x with a closed dot at the number line.A medium pollen count is greater than 4 and less than or equal to 8, hence:
A low pollen count is of amounts of 4 or less, hence: p ≤ 4.A high pollen count is an amount greater than 8, hence: p > 8.More can be learned about inequalities at brainly.com/question/25275758
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If the volume of the cube is 1 ft cubed each side of this cube is
Answers
If the volume of the cube is 1 ft cubed each side of this cube is 1 cube.
How to calculate the volume of a cube?In Mathematics, the volume of a cube is calculated by using this following formula:
V = m³
Where:
V represents the volume of a cube.m is the side lengths of a cube.Substituting the given points into the volume of a cube formula, we have the following;
1 = m³
By taking the cubic root of both sides of the equation, we have the following:
Side length, m = ∛1
Side length, m = 1
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Rewrite in simplest term: -6(0.6w-3w-0.9)-0.9w
Answers
Answer: 13.5w+5.4
Answer:
13.5w + 5.4.
Step-by-step explanation:
Using the distributive property, we would write it out like
-6(0.6w-3w-0.9)-0.9w = -3.6w + 18w + 5.4 - 0.9w
Then we would combine like terms by adding the coefficients of the w terms:
-3.6w + 18w - 0.9w = 13.5w
Lastly we can add the constant terms.
13.5w + 5.4 = 13.5w + 5.4
Determine the domain of the following graph:
Answers
The domian of the graph is (-11, 11]
What is the domain of a graphThe domain of a graph is the set of all possible input values (or independent variable values) for which the function is defined and produces a valid output (or dependent variable value).
How to determine the domian of the graphFrom the question, we have the following parameters that can be used in our computation:
The graph
As stated above:
The domain of a graph is the set of input values of the graph
Using the above as a guide, we have the following:
The input values start from x = -11 (open circle)The input values end at x = 11 (closed circle)When this is represented as an interval, we have
(-11, 11]
Hence, the solution is (-11, 11]
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What Percent of Cedric's gross pay is his net pay. Round to the nearest tenth of a percent. Gross=$2,195 Net=$1,714. 74
Answers
we know that we must add 29.8% more, in decimal form, to the net income in order to get the gross income.
Let's see the facts:
Income = $3,788
Withheld:
6.2% for social security
1.45% for medicare
16% for federal income tax
6.15% for state income tax
Now, with this given data, we can asseverate that the gross income is obtained by multiplying the net income by the sum of percentages as follows:
The sum of contributions: 6.2+1.45+16+6.15 = 29.8 %
So, we know that we must add 29.8% more,in decimal form, to the net income in order to get the gross income.
The gross income is:
Gross income= 3,788x 1.298
[Because 1 represents 100% and 0.298 represents %29.8]
Gross income = $4,916.82
The complete question is-
Cedric's monthly net income is $3,788. The following is withheld from him monthly gross income: 6.2% for social security • 1.45% for Medicare 16% for federal income tax 6.15% for state income tax Determine Cedric's monthly gross income. Round your answer to the nearest cent.
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What appears true about these two triangles? Please provide a true hypothesis?
Answers
The two triangles are similar using the AA criteria of similarity.
What are vertically opposite angles?When two lines cross at a point, vertical angles are created. They are always on an equal footing. In other words, four angles are created anytime two lines cross or meet. It is evident that two opposed angles are equal and are referred to as vertical angles. They are also known as "Vertically opposed angles" due to the fact that they are perpendicular to one another.
In the given figure it is given that, AB is parallel to DF.
Thus, angle ABC = angle CDF
Also, the angle ACB and DCF form vertically opposite angles, and are equal.
Thus, the two triangles are similar using the AA criteria of similarity.
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