Final answer:
Kelly needs to save $7 more to buy the game.
Step-by-step explanation:
To find out how much more money Ryan and Kelly need to save to buy the game, we need to calculate how much money Kelly has. Given that Kelly has seven times as much money as Ryan, we can calculate Kelly's money by multiplying Ryan's money by 7. Ryan has 10 quarters, so he has 10 * $0.25 = $2.50. Kelly has 7 times as much money as Ryan, so she has 7 * $2.50 = $17.50.
The game costs $27, and Ryan and Kelly have a total of $2.50 + $17.50 = $20. If they combine their money, they still need to save $27 - $20 = $7 more to buy the game.