Courtney has 12 fewer stickers than Tina. How many stickers does Courtney have in terms of x? Write algebraic expressions for the following scenarios.

How many ordered pairs of positive integers satisfy xy=32?

For which pairs of functions is (f•g)(x)=12x? f(x)=3-4x and g(x)=16x-3 f(x)=6x2 and g(x)= 2/x f(x)= and g(x) = 144x f(x)=4x and g(x) =3x

The diameter of the moon is about 3500 km. approximate the surface area of the moon using the formula for the surface area of a sphere, s = 4? r^2. write your answer in scientific notation.