Gym a charges a $50 membership fee and $20 per month. gym b charges a $10 membership fee and $30 per month. after how many months is the total cost the same at both gyms?

4 months.

Making these into an mx + b = y equations, this is my work:

20x+50 = 30x+10

Subtract 20x from each side.

50 = 10x+10

Subtract 10 from each side.

40 = 10x

Divide each side by 4.

x = 4.

You can then input x into each equation and get 130$ after 4 months.

explanation:

previous steps have made pa≅ pb ≅ st ≅ su. setting the compass width to ab allows you to make tu the same length. then δstu ≅ δpab by the sss congruence postulate, and ∠p ≅ ∠s by the reason cpctc.

i suppose it should be (y=2x-5)

step-by-step explanation: