Question

The following table shows the cost of joining two different gyms.SILVER'S GYM- $65 sign up fee $50 per month for membership SOLAR FITNESS- $20 sign up fee $55 per month for membership Define a variable for the number of months you'll be signed up for a gym membership

Answer 1

In order to write down the cost of joining to each Gym, you take into account both cost of sign up and cost per month. If you chose x as the variable that determines the number of months, you can write algebraically the costs for each gym as follow:

silver's gym costs = 65 + 50x

solar fitness costs = 20 + 55x

That is, the cost is cost of sign up plus cost of merbership per month (variable x)