Answer:
<h2>a) - a² + 5ab + 8</h2>
Step-by-step explanation:

You have to do 7,800 divide by 12 and you get D) 650.
Answer:
9.8t
Step-by-step explanation:
3.9t + 5.9t = 9.8t
Answer:
c) 82
Step-by-step explanation:
It's 82 degrees because of the opposite interior angle theorem, which means that those two angles are the same, as well as any pair of opposite interior angles.