Verify the identity. (1 point) cot x minus pi divided by two. = -tan x

Factor completely. 4p^2 + 36p + 81 express the answer in the form (ap + b)^2

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 is the lcm of 16 and 40 ? 24 and 40 ?