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The area of a rectangle is represented by the function x^3 − 2x^2 − 40x − 64.

The width of the rectangle is x + 4. Find the expression representing the length of the rectangle.

x^2 − 8x − 20
x^2 + 12x + 20
x^2 − 6x − 16
x^2 + 10x + 16

45

step-by-step explanation:

step-by-step explanation:

step 1: solve one of the equations for one of the variables. let's solve the first equation for y:

step 2: substitute that equation into the other equation, and solve for x.

step 3: substitute x = 4 x = 4 x=4 into one of the original equations, and solve for y.