Find the value of b-7 when b=18

would i just subtract 18-7??

Given the graphed function below which of the following orders pairs are found on the inverse function

If on=8x-8,lm=7x+4,nm=x-5,and ol=3y-6

Einstein office equipment has a rental plan for office machines. a fax machine that lists for $722.98 can be rented for 22% of the price annually. the state imposes a usage charge of 3.2%. if stephen hawking travel decides to rent the fax machine, what will its total monthly rental charge be?