Answer:
(b) 2.50P +1.25S = 696.25 and P +S = 384
Explanation:
You want the equations necessary to find numbers of pizza slices and sodas when a total of 384 $2.50 pizza slices and $1.25 sodas were sold for $696.25.
Equations
There are two relations given in the description of the scenario. One relates the numbers of slices and sodas to their total. The other relates the prices of slices and sodas to the total revenue. The required equations describe these relations:
2.50P + 1.25S = 696.25 . . . . . . . equation for revenue
P + S = 384 . . . . . . . . . . . . . . . . . . equation for numbers sold
These equations match choice B.
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Additional comment
Their solution is P = 173, S = 211. It works well to solve by substitution: S = 384 -P.
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