Line c passes through points (9, 9) and (3, 2). Line d is parallel to line c. What is the slope of line d?

Solve the given system of equations. 2y= -x+9 , 3x-6= -15

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?

Can someone me immediately, this is due by midnight! if you can't see the question, i'll text it to you. show the steps you took to get your answer.