Solving a linear inequality is comparable to solving a linear equation because the goals of both are the same, namely to obtain the variable alone.
The right answer, option D, is The Barbara equation did not take into account the number of bottles of water.
The cost of a bottle of iced tea is $1.49.
The cost of a bottle of water is $1.25.
[tex]1.25x+1.49=100[/tex]
In this question, Barbara multiplies the bottle's selling price by the number of bottles using the coefficient x.
However, she did not apply any coefficient to the bottle of water.
[tex]1.25x+1.49y =100[/tex]
where y is the number of water bottles sold to make a $100 profit.
As a result, the right answer is that the Barbara calculation did not take into account the number of bottles of water.
For more information about linear equations, refer below:
https://brainly.com/question/567493