At Silver Gym, membership is $20 per month, and personal training sessions are $35 each. At Fit Factor, membership is $70 per month, and personal training sessions are $25 each. In one month, how many
personal training sessions would Sarah have to buy to make the total cost at the two gyms equal?

Step-by-step explanation:

Total cost of Silver Gym  = 35 + 25N     where N is the number of sessions

Total cost of Fit Factor  = 75 + 15N    

To find out when the costs are equalset the equations equal

35 + 25N  = 75 + 15N     subtract 15N from both sides

35 + 10N  = 75        subtract 35 from both sides  

10N  = 40         divide both sides by 10

N  = 4   sessions

a .4y4

hope this !

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.