Answer:
I think this is the answer

Soooooo sorry but I only understood part a and c.
sorry
Answer:
85.5
Step-by-step explanation:
57 + 57/2 = 57 + 28.5 = 85.5
Its (-10,-4) because when you graph it you get (-10,-4) straight through the orgin
Answer:
17. 2.75
18. 5.50
19. 8.24
Step-by-step explanation:
To find a tip, multiply the total by the percent as a decimal.
27.48*0.10 = 2.75
27.48 *0.20 = 5.50
27.48 = 8.24