Answer:
C (as marked)
Explanation:
The only offered choice that has the correct sums (23 and 26) is choice C.
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Additional comment
The purpose of each of the equations is to express the total cost of the described purchase. If x is the cost of a hamburger, then the cost of two hamburgers is 2x. Likewise if y is the cost of a drink, then the cost of 5 drinks is 5y. The total cost of 2 hamburgers and 5 drinks will be ...
2x +5y
This value is said to be $23, so the appropriate equation for this relation is ...
2x +5y = 23 . . . . . part of answer choice C only