Answer: A
Step-by-step explanation:

I think you mean x^2 - 7x + 8
This is a basic factoring problem:
What two numbers multiply to make 8 and add to make -7?
There are no two numbers that work!
Therefore, it is prime
It would be 91°. Angles M and R correspond to each other.
Answer:
3000000000 times bigger
Step-by-step explanation: