Brian is a waiter he waits in a table for his bill comes to $110.31 if brian receives a 15% tip approximately how much will he receive

Brian will get roughly $16.55.

For this situation you will want to use 0.15 as 15%, and multiply this by the total cost of the bill.

$110.31 x 0.15 = $16.55

I got 16.54 as the answer

Step-by-step explanation:

Multiply 110.31 by 15% and you should have your answer

if you are saying purchasing 3 social media ads and one newspaper ad counts as one purchase then there are:

6 purchases

if you are asking how many of each then:

18 social media ads

6 newspaper ads

thats not a system of equations, that is a solution