The fish population in a lake decreases by 20% each year. what is the common ratio?

Which is the completely factored from of xy^3-x^3y

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.

James was playing a game with his friends. he won 35 points. then he lost 15, lost 40 and won 55. how did he come out