Answer:
$825
Explanation:
You have to create an equation.
Your equation is x = 150 + 135y, "x" represents the total amount of money Jack spent that year, and "y" represents the 5 dollars that you have to pay every time you have to visit the gym and Jack went to the gym 135 times, so you have to multiply 135 and 5 which is 675.
We have broken the equation down to x = 150 + 675, so you just have to do 150 + 675 which is 825.
Jack spent $825 last year.
Hope this helps!