The answer is m to the power of 8. Just add exponents with the same base.
The first one ,to substitute 3xy from -16 ...so divided both side by 3 .so, (xy =-5.33). the second one,5xy =-20. so,divided both sides by 5 so xy = -4....
2/7 = 0.29 ---- rounded up plus the 7 = 7.29
(-2 3/7) 3/7 = 0.43 ---rounded up ---- plus the -2 = -2.43
7.29 - (- 2.43) = 9.72 ----- negative and negative equal posirive
#18
-2.45 - (-3.94) = 1.49
20 to 30 and this is to make it 20 characters long :3
3 by 3 by 3 by 3 or 6 by 6 or 12
