The area of Kylie's room is 400 square feet. The width of her room is 20 feet. What is the length of her room?

for this pair of functions g(x)=x-2 and f(x)=|x| is (g o f)(a)= |a| -2

step-by-step explanation:

g(x)=x-2

f(x)=|x|

(g o f)(a)=?

(g o f)(x)=g(f(x))

(g o f)(x)=g(|x|)

(g o f)(x)=|x|-2

(g o f)(a)=|a|-2

the first one is x^2+2x+2

the second one is x^2+4

the last one is x^2-4x+8

1st part is 64,000,000

2nd part 500,000

step-by-step explanation: