To find the number of pizza slices (P) and sodas (S) sold at the concession stand, you can set up the following system of equations based on the problem statement:
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The revenue equation: \( 3.50P + 1.50S = 800 \) (because pizza slices sell for $3.50 each and sodas for $1.50 each, and the total revenue is $800)
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The total items sold equation: \( P + S = 344 \) (because the total number of pizza slices and sodas sold is 344)
The correct set of equations used to solve this problem is: \( 3.50P + 1.50S = 800 \) and \( P + S = 344 \)
So the correct response from your options is: 3.50P + 1.50S = 800 and P + S = 344