Question

On Monday, Roberto paid $7.20 for 3 coffees, 2 donuts, and 6 cookies. On Tuesday, he paid $7.80 for 4 coffees, 4 donuts, and 1 cookie. On Wednesday, he paid $7.70 for 2 coffees, 2 donuts, and 10 cookies. Which equation below does not belong in as system of equations to determine the price of a cup of coffee.

Answer 1

To determine the price of a cup of coffee, set up a system of equations using the given information and solve it.

Step-by-step explanation:

To determine the price of a cup of coffee, we need to set up a system of equations using the given information. Let's use the variable c to represent the price of a cup of coffee.

From the information given, we can set up the following equations:

Monday: 3c + 2d + 6k = 7.20

Tuesday: 4c + 4d + k = 7.80

Wednesday: 2c + 2d + 10k = 7.70

To solve this system of equations, we can use any method such as substitution or elimination. The equation that does not belong in the system is: 2c + 2d + 10k = 7.70, since it represents the price of coffee, donuts, and cookies together, not just the price of coffee.