It takes 34 minutes for 6 people to paint 6 walls. how many minutes does it take 18 people to paint 18 walls?

Find the number of positive three-digit even integers whose digits are among 9, 8, 7,5, 3, and 1.

Two corresponding sides of two similar triangles are 3cm and 5cm. the area of the first triangle is 12cm^2. what is the area of the second triangle?

Given the functions, f(x) = 2x^2 - 1 and g(x) = 5x, find f(g(x)) and g(f(