If you want to leave a 20% tip and the total bill was $87.37, What is the price of the bill including the tip? :D

The linear equation is: y=ax+b

The question is kind of confusing. if it's asking how many variations of answers can you give. then do 4^5 for your answer.this would be something like the first question could be a and the 2nd c or first b next c etc. if you can, ask the teacher for a better confirmation of what it's asking. if i'm assuming correctly what it's asking, it's 625 different variations.