Me ! hurry before 2/2/! and tell me how cause i have to write it down

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.

What expression is equivalent to (84+16)

Sawsan recorded the favorite sport of students at her school. she surveyed 200 students. how many students chose tennis?