Is (3,1) the solution of the system of equations shown below?
2x + 3y = 9
-2x + y = -5
A, no
B. yes
C. Same Line
D. Not Enough Info

Solve the system of equations. y= 2x y= x^2 - 15

He that is measured at 220° is a reflex angle. the opposite angle is obtuse. find the measure of obtuse .

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?