



 
Hi Sandhiya, I can help get you started. First I am going to write the cost on cents rather than dollars so that I can work with integers. Let h be the cost of a hotdog in cents and s be the cost of a soft drink in cents. Then for the first group
and for the second group
The augmented matrix for this system of linear equations is then The first thing I notice is that the first row has a common factor of 5 so multiply the first row by 1/5 Multiply the first row by 3 add add it to the second row Can you complete the problem now? Penny  


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