Walnuts are 5 dollars a pound. Jack brought p pounds of walnuts and paid $25. Translate the following into a mathematical equation

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

Jack did 3/5 of all problems on his weekend homework before sunday. on sunday he solved 1/3 of what was left and the last 4 problems. how many problems were assigned for the weekend?

James was playing a game with his friends. he won 35 points. then he lost 15, lost 40 and won 55. how did he come out