Answer:
PART A:
PETER
PART B:
GIWA
PART C:
WEEK 10
Step-by-step explanation:
PART A:
Peter saves $10 every week why GIWA saves $10 every two weeks making it $5 every week.
PART B:
GIWA started with more money. He started with $ 70 why Peter started with $20
PART C:
They both had $120 in the tenth week
Answer:

Step-by-step explanation:

To find the inverse of this function, temporarily the f(x) with a y (or whatever else you want) and then solve for the x.

Now, you can swap the variables again and write the function.

See picture for solution to your problem.
Answer:
-10
Step-by-step explanation:
-2.5 times 4
-10