Which equation has the solution x=9?
1. 9x=45
2. x+9=10
3. x-9=0
4. 4x=9

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

Find dy/dx using implicit differentiation ln(20+e^xy)=y

What is the slope of the line that contains the points (-5, 6) and (14. - 7)?