Arectangle has a length that is 4 times longer than it's width. if the total area of the rectangle is 121 square feet, what is the length (longer side) of the rectangle

L = 22 ft

Step-by-step explanation:

Let L and W represent the length and width respectively.

L = 4W, or W = L/4.  Use W = L/4 because we want to solve for W, not for L.

Area of a rectangle:  A = L · W

Here,                          A =  L · L/4 = 121 ft²

Mult. both terms by 4 removes the fraction:

                                         L² = 484

Finding the square root of this result:  L = 22

The length of the rect. is 22 ft.

37

step-by-step explanation:

hello from mrbilldoesmath!

answer:   x (x+6)^2, choice b

discussion:

factor x out of the equation:

x^3 + 12x^2 + 36x = x (x^2 + 12x + 36).

note that 6+6 = 12 and 6*6 = 36 so the above factors into:

x (x+6)^2

which is choice b

you,

mrb