Help help help help help I have 5 minutes

Isuck at math ; ^; m a student solved this problem and said the answer is 3 feet. chase had a roll of ribbon that contained 7 7/8  feet of ribbon. he cut off one piece that was 3 5/8  feet long and another piece that was 1 1/4  feet from the roll. how much ribbon was left on the roll? is the student's answer reasonable? yes, the answer is reasonable. no, the answer is not reasonable. it should be about 2 feet. no, the answer is not reasonable. it should be about 13 feet. no, the answer is not reasonable. it should be about 4 feet.

You deposit $5000 each year into an account earning 3% interest compounded annually. how much will you have in the account in 30 years?

Which value of m will create a system of parallel lines with no solution? y= mx - 6 8x - 4y = 12