Which expression represents the product of x^3+2x-1 andx^4-x^3+3 A) x^7 - 2x^4 - 3

B) x^12 - x^9 + x^4 + 2x^3 + 6x - 3

C) x^7 - x^6 + 2x^5 - 3x^4 + 4x^3 + 6x - 3

D) x^4 + 2x + 2

Solve - pv + 40 < 65 for v solve 7w - 3r = 15 for r

The blue whale is the largest animal living on the earth. the average blue whale measures 100 feet long (30 meters) and weighs 300,000 pounds (136,000 kilograms). a whale’s head is 1⁄3 of the length of its body. a new baby whale is 1⁄4 the length of a grown whale. the average man is 1⁄17 the length of a blue whale, and 1⁄1,818 its weight. a human baby measures 1⁄4 of the length of an adult. calculate the following information: how long is a whale’s head? how long is a new baby whale? how tall is the average man? how much does the average man weigh? how tall is the average human baby?

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).