After a 20% tip, you pay a waitress $72. What was the original bill?

If you want to find out how to calculate a tip, you need to decide how much you appreciate the service. There is an unwritten rule that a tip should be between 10% and 20% of the total value of the bill.

$ 86.4

Step-by-step explanation:

hope this helps

so sorry if this is wrong

answer: it actually depends on which is the independent variable and which is the dependent variable. let us say we're looking at a linear equation. y=2x+3. we theoretically could switch the equation to be x=(y-3)/2 and it would be the same line. so either a causes b or it can be that b causes a. so technically the answer is false

step-by-step explanation: