The Shake Shack sells large and small shakes. A large shake costs 5 dollars , and a small shake costs 3 dollars On Sunday, the Shake Shack had a total revenue of 479 dollars Which equation can be used to represent x , the number of small shakes sold and y , the number of large shakes sold?
Answer
A
5 x plus 3 y is equal to 479
B
479 x plus 479 y is equal to 15
C
4 x plus 4 y is equal to 479
D
3 x plus 5 y is equal to 479
Explanation
Each small shake brings in $3, so x small shakes earn 3x dollars. Each large shake brings in $5, so y large shakes earn 5y dollars. Their combined revenue is $479, giving 3x + 5y = 479, which is choice D.
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