Which expression is equal to 0 when simplified?

a. 2n - 3m - (2n + 3m)
b. 6(x - y) + 2(3x +3y)
c. 15p - 15p ÷ 3
d. 4a(2 - 3) + 4a

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

Use circumcenter theorem to solve for the given values

Can someone me with this graph problem by the way i need to know the answers by today since this assignment is due ! !