The cost of painting a wall varies directly with the area of the wall.write a formula for the cost of painting a rectangular wall with dimensions l by w. with respect to l and w, does the cost vay directly,jointly, or inversely?

The area of the wall is l*w, which the cost is directly related to.

Therefore, the formula is c = l*w.

The cost is jointly varied, because the cost is related to the length and the width, multiplied. (The jointly variation equation is y = kxz, which the formula we made is similar to)

5

step-by-step explanation:

firstly, we have to find gfc

so it'll be like

200=2×2×2×5×5

175=5×5×7

140=2×2×5×7

gfc is 5