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 bottles she needs to sell to earn $100.

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

A = Barbara’s equation did not consider the number of bottles of water.
B = Barbara’s equation did not consider the number of bottles of iced tea.
C = Barbara’s equation did not use the correct price for the bottles of iced tea.
D = Barbara's equation did not use the correct total for sales.

Answer 1

B. Barbara's equation did not consider the number of bottles of iced tea. She only put 1.49, which would mean she only sold one. Because we know she sells more then one, it should be 1.49(then a variable)

Answer 2

B = Barbara’s equation did not consider the number of bottles of iced tea.

Explanation:

Barbara sells iced tea for $1.49 per bottle and water for $1.25 per bottle.

Let the water bottles she needs to sell be = x

Let the iced tea she needs to sell be = y

As she wants $100, she has to sell the following numbers of drinks.

`1.25x+1.49y=100`

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But, Barbara wrote an equation
`1.25x+1.49= 100`

She did not put a variable with 1.49, that will depict the number of iced teas she needs to sell.

Hence, option B is correct.