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Mathematics 9 Online
OpenStudy (elisuzsmith):

at joe's cafe 1 cup of coffee and 3 donuts is $4.10 and 2 cups of coffee and 2 donuts is $4.60, how much is 1 count? 1 cup of coffee?

OpenStudy (mathstudent55):

Set up a system of equations and solve it.

OpenStudy (mathstudent55):

The first step is to pick variables to represent the prices of a cup of coffee and a donut. For example, let c = price of 1 cup of coffee let d = price of 1 donut Ok so far?

OpenStudy (elisuzsmith):

c+3d=4.10 and 2c+2d=4.60

OpenStudy (elisuzsmith):

Got it

OpenStudy (mathstudent55):

Correct. Now solve the system of equations and find the values of c and d.

OpenStudy (elisuzsmith):

OpenStudy (mathstudent55):

Correct. Good job!

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