You are standing 15 feet away from your friend's apartment building and look to see your friend at an angle of elevation of 72º. How high up is your friend?

Abbey purchased a house using a fixed rate mortgage. the annual interest rate is 4.2% compounded monthly for 20 years. the mortgage amount is $235,000. what is the monthly payment on the mortgage? this isn't a multiple choice question have to show my work

The formula for the lateral area of a right cone is la = rs, where r is the radius of the base and s is the slant height of the cone.which are equivalent equations?

What are the solutions of the system? solve by graphing. y = -x^2 - 3x + 2 y = -2x + 2