Sam’s bank charges a $1.23 fee for every check more than 10 that he writes. What amount does the bank withdraw from his account if he writes 18 checks totaling $754.89?

Can someone explain the process to get the answer, I have no idea where to start with this

Trish receives $450 on the first of each month. josh receives $450 on the last day of each month. both trish and josh will receive payments for next four years. at a discount rate of 9.5 percent, what is the difference in the present value of these two sets of payments?

What is the slope of the line shown below?

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?