Answer:
10
Step-by-step explanation:
Use the number line and count how many numbers from 7 until you get to -3
Imagine it being -3=7-x
-3=7-x
Add x to both sides:
x-3=7
Add 3 on both sides:
x-3+3=7+3
x=10
Go to this site
https://www.slader.com/discussion/question/what-is-the-effect-in-the-time-required-to-solve-a-problem-when-you-double-the-size-of-the-input-fro/
there should the your answer
We simplify this expression to 
