Final answer:
The correct inequality to find the possible price values of a new mountain bike that Maddie can afford is P - 215 > 375.
Step-by-step explanation:
The correct inequality that can be used to find the possible price values, p, of new mountain bikes that Maddie can afford is P - 215 > 375. Maddie has saved $375 and her grandmother will give her $215, so the total amount she has to pay for the new mountain bike is $375 + $215 = $590. The inequality P - 215 > 375 represents that the price of the mountain bike, p, minus the additional $215 should be greater than $375, which is the total amount Maddie has. This will ensure that Maddie can afford the bike.