Answer:
x=1
Step-by-step explanation:
you can also use mathpapa it's a calculator that gives you the answer and solves it for you step by step.

Simplify the expression by multiplying exponents

Simplify the expression by cancelling the terms

Answer:
Step-by-step explanation:
the second one , why? because 7a-12a=-5a
4 - 8 = -4
Answer:
c
Step-by-step explanation:
I took the test
Answer:
17 miles
Step-by-step explanation:
4+5+5+3=17