If it is known that a+b/a-b=c, find the following: 2a-2b/5a+5b

How do you convert 1.27 to a percentage

Write the slope-intercept form of the line that passes through the point (1, 0) and is parallel to x - y = 7. t

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.