A restaurant customer left ​$1.30 as a tip. The tax was 8% and the tip was ​10% of the cost including tax.
a. Which information is not needed to compute the bill after tax and​ tip?
b. What was the total​ bill?


Answer :

the tax is $0.90. We don't need to know that the tax was 8% of the bill in order to get these equations. the total bill was 9.9

Answer:

a. Which information is not needed to compute the bill after tax and​ tip?

The tax was 8%

b. What was the total​ bill?

The total bill is 9.9.