General Formulas and Concepts:
Pre-Algebra
- Division
- Interpreting worded math problems
Application:
Step 1: Interpretation
We are given that Jasmine bought 7 yards of fabric and that the total cost was $52.61. That means each yard of fabric combined equals the total ($52.61). To find the cost per yard of fabric, since we bought 7 yards, we will need to divide the total (combined) yards of fabric by the amount of fabric purchased.
Step 2: Work
- Set up:
[tex]\displaystyle \text{Average cost per yard} = \frac{\$ 52.61 \ \text{total}}{7 \ \text{yds fabric}}[/tex] - Divide:
[tex]\displaystyle\begin{align}\text{Average cost per yard} & = \frac{\$ 52.61 \ \text{total fabric}}{7 \ \text{yds fabric}} \\& = \$ 7.51571 \ \text{fabric per yd} \\& \approx \$ 7.52 \ \text{fabric per yd} \\\end{align}[/tex][tex]\displaystyle \begin{align}\text{Average cost per yard} = \frac{\$ 52.61 \ \text{total}}{7 \ \text{yds fabric}}\end{align}[/tex][tex]\displaystyle\begin{aligned}\text{Average cost per yard} & = \frac{\$ 52.61 \ \text{total fabric}}{7 \ \text{yds fabric}} \\& = \$ 7.51571 \ \text{fabric per yd} \\& \approx \$ 7.52 \ \text{fabric per yd} \\\end{aligned}[/tex]
Answer:
∴ The average cost per yard of the fabric she bought is approximately equal to $7.52.
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Topic: Pre-Algebra
