6b + 4r represents the total cost of the rice and beans he bought. If he returns 2 bags of beans and 1 bag of rice, the expression that represents the total cost after the return is (6b + 4r) – (2b + r).

Write the rational number in lowest terms 99/-15

The figures below are made out of circles, semicircles, quarter circles, and a square. find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations).

The sum of the squares of two numbers is 8 . the product of the two numbers is 4. find the numbers.