Starbucks sells their coffee for $3.36 for 24 ounces OR
Circle K sells their coffee for $2.40 for 16 ounces

Which is a better buy and by how much?

starbucks is a better by because they each sell one ounce for the same price. from starbucks you get more ounces for the same price as you would at circle k

Step-by-step explanation:

starbucks: 24 / 336 = $0.07

1 ounce sells for about $0.07

circle k: 16 / 240 = 0.066 = (rounded) 0.07

1 ounce sells for about $0.07

Multiplying the first equation by 2 and adding the equations results in 20x = 10. The solution of the system is (1/2, 5). The system 8x + 7y = 39 and 20x = 10 is formed by replacing 4x –14y = –68 by a sum of it and a multiple of 8x + 7y = 39.