Evaluate the expression and enter your answer in the box below.
7-(4)

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

Determine the number of girls in a math class with 87 boys if there are 25 girls for every 75 boys

Icould really use some with this question.