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Orlov [11]
2 years ago
9

The perimeter of a rectangle is 68 ft. Find the dimensions of the rectangle if the ratio of the length to the width is 9 : 8. Wh

ich of the following would be the best equation to use to solve this problem?
Answers :
Question options:

A 2x + 2x = 68

B (9 + 8) = 68x

C 9x + 8x = 68

D 2(9x) + 2(8x) = 68
Mathematics
1 answer:
Kipish [7]2 years ago
7 0
I think the best answer is d since 18x + 16x
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STEP-BY-STEP EXPLANATION:

(1,-3) and (3,3)

X1=1           X2=3

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1) Find the slope of the line.

To find the slope of the line passing through these two points we need to use the slope  formula:

m = \frac{Y2-Y1}{X2-X1}

m= \frac{3-(-3)}{3-1}   m=\frac{6}{2} = 3

2)Use the slope to find the y-intercept.

Now that we know the slope of the line is 3 we can plug the slope into the equation and  we get:

y= 3x+b

Next choose one of the two point to plug in for the values of x and y. It does not matter  which one of the two points you choose because you should get the same answer in either  case. I generally just choose the first point listed so I don’t have to worry about which  one I should choose.

y= 3x+b       point (1,-3)

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Using the slope of 3 and the y-intercept of -6 the answer is:

y = 3x - 6

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