Which of the organisms as an exoskeleton a elephant b beetle c tree d flower?

What is the solution to the system of the equations? x = y - 3 x + 3y = 13

1.two more than the quotient of a number and 6 is equal to 7 use the c for the unknown number translate the sentence into an equation

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?