A.] what is the average rate of change of f(x)=x^(3)-8x+2 from -7 to -4?
b.]what is the average rate of change of f(x)=x^(3)-8x+2 from -1 to 1?
c.]what is the average rate of change of f(x)=x^(3)-8x+2 from -1 to -8?

u = -(6/7)w

step-by-step explanation:

place all values with 'u' on one side of the equation.

4u + 8w = - 3u + 2w

4u + 3u = 2w - 8w

further simplify the equation by solving the addition and subtraction.

7u = - 6w

make 'u' the independent variable by placing its co-efficient on the right-hand side.

u = - (6/7)w

answer: bearing in mind that a rectangle has a perimeter of length + length + width + width.

step-by-step explanation:

p = perimeter

l = length

x=width

p = 2l + 2x

p = 2(l+x)     < ==== perimeter of the base of the box.