3(7x)-2(4-x) simplify the expression

The volume of gas a balloon can hold varies directly as the cube of its radius. imagine a balloon with a radius of 3 inches can hold 81 cubic inches of gas. how many cubic inches of gas must be released to reduce the radius down to 2 inches?

How do you find the distance of each number from the mean

Petes dog weighed 30 pounds it then lost 16% of it's weight how much did pete lose