hot dogs cost 1.50 and sodas cost 0.75 at the end of an hour they sell 15 items and collected 18 how many hot dog and sodas did they sell?

Question

im Not sure if my answer is correct ?

Answer 1

Hi Ray,

 

Well, I don't know what you got so I can't tell you if it is right. 

If it works in both equations, it depends of whether your equations are set up correctly.

 

Here is how I would do this problem.

Let x = no. of hot dogs,y = number of sodas.

First equation is just about the number of things.

x + y = 15

Second equation is about the cost of things.

1.5 x + .75 y = 18

 

solve x+y = 15 for y  y = 15-x    substitute into second equation

1.5x + .75(15 - x) = 18    

 

You should get the correct answer for number of hot dogs if you solve this correctly.  Put your answer in the x + y =15 equation to get y.  Then put both x and y into the cost equation and check your answer.

 

Hope this helps.

 

Mary