Look at picture please !! I really need help thank you !

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.

Solve for x. −3/4(x+2)=6 enter your answer in the box

The measurement of one angle of a right triangle is 42° what is the measurement of the third angle? (there is no picture)