Question

The temperature at 6:00 a.m. was –12°F. By 3:00 p.m. the temperature had risen 21°F.

What was the temperature at 3:00 p.m.?

Answer 1

-12+21=?

Answer 2

put it in a calculator

Answer 3

9

Answer 4

is that an answer choice

Answer 5

Well what is -12 + 21?

First when you are adding the opposite integer you always change the addition sign to a subtraction sign...

(-12) - (+2)

Then you subtract them numbers, which is 9, and take the integer sign from the number with the highest absolute value, and put it on your result, which would be +9

Answer 6

Sorry I meant (+21) not (+2)

Answer 7

Got it?

Answer 8

yep

Answer 9

Glad I could help~