Write an algebraic expression for a number q tripled plus z doubled.

If a baby uses 15 diapers in 2 days, how many diapers will the baby use in a year?

The measure of one angle of an octagon is two times smaller that of the other seven angles. what is the measure of each angle?

Estimate the area under the curve f(x) = 16 - x^2 from x = 0 to x = 3 by using three inscribed (under the curve) rectangles. answer to the nearest integer.