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WITCHER [35]
3 years ago
6

Demarco wants to find the angle measures of this parallelogram. He knows that the first step is to find the value of x. Which of

these equations will result in the correct value of x?
A. x + 15 = 6x + 4

B. 7x − 19 + 2x − 8 = 180

C. 7x − 19 = x + 15

D. 6x + 4 + 7x − 19 = 180

Mathematics
1 answer:
Debora [2.8K]3 years ago
4 0
The answer is B. You had to check the work in the calculator after you showed the work. Two answers gave you whole numbers , then when you plug it in only one of them solved to 180 correctly

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Perimeter of a rectangle is 15x+17y if the length is 7/2x+7y then find the width of the rectangle
bogdanovich [222]

The perimeter of a rectangle is given by the formula,


P=2l+2w


We substitute,


P=15x+17y


and


l=\frac{7}{2}x+7y


into the above formula to obtain the expression,




15x+17y=2(\frac{7}{2}x+7y)+2w



15x+17y=7x+14y+2w




We now group the x and y terms on the Left Hand Side of the equation to get.


15x-7x+17y-14y=2w




8x+7y=2w



We now divide through by 2 to get,



4x+\frac{7}{2}y=w



Therefore the width of the rectangle is


4x+\frac{7}{2}y



8 0
3 years ago
A polygon has 7 sides. What is the sum of the measure of the exterior angles of the polygon?
Mariulka [41]
I think it's C, 360 degrees.
5 0
3 years ago
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diamong [38]

The answer I got was C = The car used 70 gallons of gas to go 3 miles.

Hope this helps.

6 0
3 years ago
Please answer see the image
mash [69]

Answer:

<h2>67.7</h2><h2 />

Step-by-step explanation:

perimeter = semicircle (x2) + parallelogram side (x2)

                = 1/2 π 12 (x2) + 15 (x2)

               = 37.7 + 30

               = 67.7

8 0
3 years ago
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Sloan [31]
The constant is 3 because it has no variable. 
The coefficient is 7b because it has a variable. 
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3 years ago
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