Greg needs a rectangular piece of plywood with an area of 18 square feet. the length of the cardboard is five less than two times the width. what is the width of the rectangle.

Step-by-step explanation:

General formula for Area = Length * width

fill in what it gives u in the problem

18=(2*width-5)*width

18=(2w-5)*w

see if you can solve the rest

Step-by-step explanation:

5x*x=18

x^2=18:5

x^2=3.6

x=√3.6

x~1.9

1.9*5=9.5

Answer ~ 9.5ft

hello from mrbilldoesmath!

answer:

(7 x + 6 y) (49 x^2 - 42 x y + 36 y^2)

discussion:

the trick is to recognize that 343 = 7^3 and 216 = 6^3 and, in general,

a^3 + b^3 =   (a + b) (a^2 - a b + b^2).

in our case

343x^3+216y^3   =   (7x)^3 + (6y)^3

so take a = 7x and b = 6y in the above equation to get the answer.

you,

mrb