Kevin plans to put concrete on a rectangular portion of his driveway. the portion is 10 feet long and 3 inches high. the price of concrete is $98 per cubic yard. the total cost of the concrete keven needs is $72.59. which of the following is closest to the width of the portion of the driveway on which kevin plans to put concrete?
3 feet
6 feet
8 feet
10 feet
i got 6 feet for my answer, but i'm not sure if i did this someone check this for me?

This the problem with non-SI units, conversion is such a nightmare. Anyhow, given $98 per cu.yd and total cost of $72.59, the volume of concrete is 0.7404 cu.yd. Converting the given dimensions to yards:

3.33 yd x (1/12) yd

Solving for the unknown dimension given volume and 2 other dimensions:

.7407 cu. Yd = (3.333 yd)(1/12 yd)(x)

X = 2.6678 yd or 8 feet 

the correct is answer is a 9-sided polygon!

option 3 . (5x + 1) - (-10x + 6)

step-by-step explanation:

option 1 :

(4x + 3) + (-9x + 4)

or 4x+3 -9x + 4

or -5x + 7

option 2

(x - 2) - (6x - 9)

or x-2-6x + 9

or -5x + 7

option 3

(5x+ + 6)

or 5x + 1 + 10x -6

or 15x -5

option 4

-4x+2x+7-3x

-7x + 2x + 7

-5x + 7

hence only option 3 did   not satisfy the given simplify expression.