Answer:

Step-by-step explanation:

Add or subtract like terms.

Maybe you should contact your teacher
Answer:
-2 hope this helps! :)
Step-by-step explanation:
-10 over 5 is -2
so a = -2
Answer:
$120
Step-by-step explanation:
12-8= 4
4.5+4=8.5
8.5-.5= 8
15*8=120
.5= 30 mins