Write an equation to model the relationship for Melissa’s pay shown in the table. Explain the meaning of the coefficient (constant of proportionality/unit rate) in the equation you wrote.

Determine whether the set of whole numbers is closed under addition. explain why the set is or is not closed. give an example.

How many credit hours will a student have to take for the two tuition costs to be equal? round the answer to the nearest tenth of an hour.

Dexter read 11 science fiction books and 5 history books. lena read 9 science fiction books and 4 history books. compare the students’ ratios of science fiction books to history books. 1. determine the ratios’ form:    science fiction books to history books 2. write the ratios as fractions:    dexter: 115; lena: 94 3. rewrite with a common denominator. 4. compare. 5. answer the question. determine which shows the correct comparison of the ratios for this problem.