Can you please solve this and give me the answer

-2x+y= 3
3x-2y= 5

Compare the subtraction problems 6/8 - 5/8 = 1/8 and 6/9 - 7/9 = 1/9 why is the answer to the first problem positive and the answer to the second problem negative

17 in long 1.3 ft wide and 8in high what is the volume

If y varies directly as x2 and y=6 when x=6, find the constant of variation.