Question

Marie is saving money to buy a prom dress that costs 225$. She already has 85$ and makes 20$ per day. Babysitting after school . Write & solve an inequality to determine how many days marie need to babysit in order to have enough money for the dress.

Answer 1

Given,

Total money needed = 225

Money already Marie has = 85

Marie per day Income = 20

Let it take x days for Marie to have enough money to buy the prom dress.

We can say:

Total Money = Money Marie already has + per day income

Using the given information, we can craft an inequality shown below:

$85+20x\geq225$

This means "85 already have plus 20 per day will need to be atleast 225".

Now, we can do algebra and solve for x. Steps are shown below:

$\begin{gathered} 85+20x\geq225 \\ 20x\geq225-85 \\ 20x\geq140 \\ x\geq\frac{140}{20} \\ x\geq7 \end{gathered}$

Thus, Marie needs 7 days more to have enough money to buy the prom dress.