Question

Barbara sells iced tea for $1.49 per bottle and water for $1.25 per bottle. She wrote an equation to find the number of drinks she needs to sell to earn $100.

1.25x + 1.49 = 100
What error did Barbara make in writing the equation?

Answer 1

The equation should have been written as 1.25x+1.49y=100.

The error made in the first equation was that Barbara did not include a variable next to the term 1.49. Since the ice tea is sold for $1.49 per bottle, a variable should be included to represent however many bottles of iced tea she sold.

Answer 2

She should also ave "variabled" the number 1.49 but with a different variable leaving the correct equation as:

1.25x + 149y = 100

Hope it helped,

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