Answer:

Step-by-step explanation:


Simplify.
C and A is the best answer
Answer:
4x+18
Step-by-step explanation:
Length = x+3+x+3
width = x+3-x= 3
perimeter = x+3+x+3+x+3+x+3+3+3=4x+18
Answer:
He started with 180.
Step-by-step explanation:
If 90 is 50% of what he started with, then the other 50% is 90