Abathtub is draining at a constant rate. after two minutes, it holds 30 gallons of water. three minutes later, it holds 12 gallons of water. right in equation that represents the number y of gallons of water in the tub after x minutes.

It would take 3minuites 40 seconds to drain completely

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.