Answer:
R=$8 M=6.8 S=8.16
Explanation:
First, you have to find 15% of 8. The answer is 1.2. Then we subtract 8-1.2. Next we get 6.8. That is how much money Marie makes per hour. So, we find 20% of 6.8. Which is 1.36. Then I add that to 6.8. The answer is 8.16. Hope this helps, let me know if correct, and have a great day!!