Skateboard revenue: a skateboard shop sells about 50 skateboards per week for the price advertised. for each $1 decrease in price, about 1 more skateboard per week is sold. the shop's revenue can be modeled by y=(70-x) (50+x). use vertex form to find how the shop can maximize weekly revenue.
[i can get this into vertex form, but i'm not understanding how to read the vertex form of the equation to answer the question]

Match each expression with its simplified form.

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?

Its due ! write an equation in which the quadratic expression 2x^2-2x 12 equals 0. show the expression in factored form and explain what your solutions mean for the equation. show your work.