15 point question! Please help me! Consider the graph of this polynomial function.

Express the following as a function of a single angle, cos(60) cos(-20) - sin(60) sin(-20)

Acredit card advertises an annual interest rate of 23%. what is the equivalent monthly interest rate?

At the "no mutants allowed" country farm, every sheep has 4 legs, every chicken has two legs, and all animals have only 1 head. asked to count how many sheep and chicken are in the fields, a farm boy reports back that there are 140 feet and 50 heads. how many sheep and chicken are there? there are sheep and chicken at the farm.