What are the x and y-intercepts of the line described by the equation 4x-8y=40

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?

What are the constants in this expression? -10.6+9/10+2/5m-2.4n+3m

Simplify a7/a4 a) 1/a3 b)-a/a2 c)a4/a3 d)a3