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

1760 kilometers

step-by-step explanation:

multiply the amount of time the plane took to travel by it's speed

idk

step-by-step explanation:

use that smart brain

step-by-step explanation:

two pairs of adjacent sides are of equal length. this implies that one diagonal divides the kite into congruent triangles, and so the angles between the two pairs of equal sides are equal in measure. it also implies that the diagonals are perpendicular.

answer: 8 years

step-by-step explanation:

the explanation is that in 8 years the child will be 20 and in 8 years the father will be 40 and 20 is half of 40.