Use the substitution method to solve the system. {m+n=5m−n=3 what is the solution? the solution is (4, 1). there is no solution. there are an infinite number of solutions. the solution is (2, −1).

What is the value of x in the following equation. -x ^3/2 = -27

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.

There are 45 questions on your math exam. you answered 810 of them correctly. how many questions did you answer correctly?