The answer is 15. -3 (-) -10 (-) -8= 15. Think of it as money owed. Let's say you owe your friend Jill $3. But then Jill borrows $10 from you. How much does Jill owe you now. $7. Now Jill borrows 10 more dollars from you. How much total is owed to you? Jill owes you $15. Hope that helped!
