15
155
15 + 35 = 50
The sum of -15 and -35 is -50.
That depends what the value of a is.
6 hours, 50 minutes
196
280
3
122 is the answer, NOT 142(as the previous poster said, which is wrong.) This is why: 35+47=82 82-10=72 72-50=22 22+100=122
Multiplication is done before addition, so it will be done before the plus. The result is:35 + 3 x 5 = 50
37