Apine tree grows about 18 inches per year. after how many years will the tree be 90 inches tall? [type your answer as a number.]

Which of the following is true for the relation f(x)=2x^2+1

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.

Find the axis of symmerty for x y=x squared -4x-8