Final answer:
To determine the value of y when x is 11, substitute 11 into the equation y = x² + 4 and calculate the result.
Step-by-step explanation:
To determine the value of y when x is 11, we can substitute 11 into the equation y = x² + 4. So, y = 11² + 4. Calculating this, we get y = 121 + 4 = 125. Therefore, when x = 11, the value of y is 125.
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