Homework, please help, really need help on this, 10 points. Don’t answer if you are unsure or just need points, it wastes my time and my points :)

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

For f(x)=2x+3 and g(x)=x^2- 8 find (f+g) (x)

Write an equation of the line that passes through the point (2, 3) and is perpendicular to the line x = -1. a) y = 1 b) y = 3 c) y = 0 eliminate d) y = -3