In Math camp 144 problems were solved in two days.
The number of problems solved on the second day is
80% of the amount of the problems solved during the
first day. How many problems were solved in the first
day?

80 questions.

Step-by-step explanation:

-Let X be the number of problems solved on day 1.

-Questions solved on day 2 are:

We know that the total number of questions solved is 144:

Hence, the number of questions solved on the first day is 80

the final amount you will pay is $68.04.

the tip is determined by the pre-tax amount, so we calculate the tip based on the original bill, not after we've added sales tax.

to find the tip:

we can divide 54.00 by 100 to get 1% of 54. then we multiply that by 18.

54 / 100 = .54

.54 x 18 = 9.72

tip = 9.72$

to find the tax:

we can divide 54.00 by 100 to get 1% of 54. then we can multiply that by 8 to get 8%.

54 / 100 = .54

.54 x 8 = 4.32

tax= 4.32

now we can add the tip and tax to the bill to get our total.

54 + 9.72 + 4.32 = 68.04

total: $68.04

step-by-step explanation: