Given -28 and 18. what is the midpoint?

Find the greatest common factor of -30x 4 yz 3 and 75x 4 z 2.

If my mom gets $13.05 an hour, and she works from 3: 30 to 10: 45 in the morning, how much money does my mom make?

Given the expression (7 ? 4i) ? (2 + 6i), perform the indicated operation and write the answer in the form a + bi.