The sum is: 8
It is: 8+1+7 = 16
15
The sum of 7 and -8 is -1.
-7
The sum of -7 and -8 is -15.
It is 9/8 plus 7/3 = 83/24
-4 minus 8 plus 5 is equal to -7
The sum of 8/9 and 4/7 is 1 29/63.
6 plus 7
The sum of 15 and -7 is 8.
(7 + 3i) + (8 + 9i) = (7 + 8) + (3i + 9i) = (7 + 8) + (3 + 9)i = 15 + 12i Which can also be written as: 15 + 12i = 3(5 + 4i).