1. The problem is to understand the expression $y = 5.25 + 10544.25$ and simplify it. 2. The formula used here is simple addition of two numbers. 3. Add the two numbers: $$y = 5.25 + 10544.25$$ 4. Perform the addition: $$y = 10549.5$$ 5. Therefore, the simplified value of $y$ is $10549.5$. This is a straightforward addition problem where you combine the two given numbers to find the total.