Alvin is 5 years older than Elga. The sum of their ages is 53. What is Elga's age?

At which value in the domain does f(x) =0?

Which of the following expressions is equal to 2x^2+8

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.