Agood practice in mathematics is to always check your work. explain why it is very important to do so when you are solving equations that involve radical expressions?

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.

Acomputer store bought a program at a cost of $10 and sold it for $13. find the percent markup

What is always true about a positive integer raised to a negative odd power?