Answer:
800
Step-by-step explanation:
Answer: 2.87
Step-by-step explanation:
you divide the miles by the gallons
Answer:
9
Step-by-step explanation:
Firstly you can simplify the exponents shown below:

Simply add exponents when multiplying like shown above.
Answer:
Add 30 to each side so L+L/3+L=630 then Multiply each side by 3 so 3L+L+3L=630 then add together the L's to get 7L=630 then divide by 7 so L=90