Given f(x) = x - 7 and g(x) = x2
Find gif{4))

9

Explanation:

let f(x)= x-7 be equation i

let g(x)= x^2 be equation ii

Substitute x-7 as x in equation 2

implies gf(x) = (x-7)^2=(x-7)(x-7)

              substitute x=4 implies

gf(x) = (4-7)(4-7)=(-3)(-3)=9

what is the volume occupied by 40 grams of argon gas (ar) at standard conditions? what volume, in liters, is occupied by 1.5 x 1023