Y=6-4(2). What is the value of y=6-4x when x=2

Hello, i need compare km^2 and km. what's difference in this?

Problem 3 a bank charges a service fee of $7.50 per month for a checking account. a bank account has $85.00. if no money is deposited or withdrawn except the service charge, how many months until the account balance is negative

3/4 + p = 1/2? i’m not sure how to solve it