Which of the following sets is closed under division? A)national numbers
B)non-zero integers
C)irrational numbers
D)non-zero rational numbers ​

Which expression is equivalent to (9x - 3 1/ + 1 3/8)

The border line of the linear inequality 4x + 7y < 5 is dotted true or false?

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.