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A hamburger costs twice as much as a hot dog. Three hamburgers and two hot
dogs cost $21. Choose the system of linear equations that represents this problem.

A. 2y=x
2x+3y=21

B. y=2x
2x+3y=21

C.x=2y
3x+2y=21

D.y=2x
3x+2y=21

Respuesta :

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Answer:

C

Step-by-step explanation:

Hamburger = Hotdog x 2

3(Hamburger) + 2(Hotdog) = 21

Now replace with x (Hotdog) and y (Hamburger)

y = 2x

3y + 2x = 21

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