Final answer:
Keilantra has 15 coins when she finds 11 nickels and 4 quarters. For a general case with x nickels and y quarters, the total number of coins she has would be x + y.
Step-by-step explanation:
The subject of the question pertains to count and combine different types of coins and finding the sum. To solve this mathematical problem completely, we begin by examining the first scenario where Keilantra finds a certain number of nickels and quarters.
For the first part of the question, if Keilantra has 11 nickels and 4 quarters, then the total number of coins Keilantra has can be calculated by simply adding these two numbers:
- Number of nickels = 11
- Number of quarters = 4
Total number of coins = 11 nickels + 4 quarters = 15 coins.
For the second scenario, where Keilantra has x nickels and y quarters, the total number of coins can be represented as the sum of x and y:
Total number of coins = x nickels + y quarters = x + y coins.