Answer:
<u>4 hours</u>
Step-by-step explanation:
Equations :
Larry : <u>y = 20x + 90</u>
Barry : <u>y = 30x + 50</u>
Equate both to find the number of hours at which they both charge the same :
- 20x + 90 = 30x + 50
- 30x - 20x = 90 - 50
- 10x = 40
- x = <u>4 hours</u>
<span>b. x=30°,y=13.1x=30°,y=13.1</span>
Answer:
you have to round down because if you round up she wouldn't have enough money. And you can't buy half a book.
Step-by-step explanation:
