For which pairs of functions is (fog)(x)=x?

f(x) = x2 and g(x) = 1/x

f(x) = 2/x and g(x) = 2/x

f(x) = x-2/3 and g(x) = 2-3x

f(x) = 1/2 x-2 and g(x) = 1/2 x+2

With this question! what is process of elimination? ? p.s. my brothers acc got banned so add his new one @ yamauchiyamyam17

Mary works for a company that ships packages and must measure the size of each box that needs to be shipped. mary measures a box and finds the length is 7 inches, the width is 14 inches, and the height is 15 inches. what is the volume of the box? [type your answer as a number.]

Write the fraction 9/50 as a decimal if needed round to the nearest hundredth