Write a system of equations to describe the situation below, solve using substitution, and fill in the blanks.
A yoga studio offers memberships that cost $30 per month for unlimited classes. The studio
also accepts walk-ins, charging $3 per class. If someone attends enough classes in a month,
the two options cost the same total amount. What is that total amount? How many classes is
that?

Name the quadrilaterals that have four equal sides.

Julius sold five times as many computers as sam sold last year. in total, they sold 78 computers. how many computers did julius sell?

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.