Which store offers the best buy? A A B B C C D D Store P

Name: Problem 42, Chapter 4: Prealgebra
Uploaded: 2020-06-07T21:59:07-08:00
Duration: 3 min
Channel: Sarah Lewites
Description: Which store offers the best buy? A A B B C C D D Store Potatoes A 18 for 12 B 30 for 24 C 36 for 30 D 42 for 30

step 1 So in this problem, we have all these different prices for potatoes. And to determine which is t

Question

Which store offers the best buy? \begin{aligned}&\begin{array}{l}\text { A A } \\\text { B B } \\\text { C } C \\\text { D D }\end{array}\\&\begin{array}{|c|c|}\hline \text { Store } & \text { Potatoes } \\\hline \mathrm{A} & 18 \text { for } \$ 12 \\\hline \mathrm{B} & 30 \text { for } \$ 24 \\\hline \mathrm{C} & 36 \text { for } \$ 30 \\\hline \mathrm{D} & 42 \text { for } \$ 30 \\\hline\end{array}\end{aligned}

   Which store offers the best buy?
\begin{aligned}&\begin{array}{l}\text { A A } \\\text { B B } \\\text { C } C \\\text { D D }\end{array}\\&\begin{array}{|c|c|}\hline \text { Store } & \text { Potatoes } \\\hline \mathrm{A} & 18 \text { for } \$ 12 \\\hline \mathrm{B} & 30 \text { for } \$ 24 \\\hline \mathrm{C} & 36 \text { for } \$ 30 \\\hline \mathrm{D} & 42 \text { for } \$ 30 \\\hline\end{array}\end{aligned}

Prealgebra

Carol E. Malloy,… 1st Edition

Chapter 4, Problem 42

Instant Answer

Solved by Expert Sarah Lewites

06/07/2020

Step 1

We can do this by dividing the total cost by the number of potatoes. For store A, the cost per potato is $\frac{\$12}{18}$, which simplifies to $\frac{2}{3}$ of a dollar per potato. Show more…

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Which store offers the best buy? \begin{aligned}&\begin{array}{l}\text { A A } \\\text { B B } \\\text { C } C \\\text { D D }\end{array}\\&\begin{array}{|c|c|}\hline \text { Store } & \text { Potatoes } \\\hline \mathrm{A} & 18 \text { for } \$ 12 \\\hline \mathrm{B} & 30 \text { for } \$ 24 \\\hline \mathrm{C} & 36 \text { for } \$ 30 \\\hline \mathrm{D} & 42 \text { for } \$ 30 \\\hline\end{array}\end{aligned}

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Key Concepts

Unit Price Calculation

This concept involves determining the cost of a product per individual unit by dividing the total price by the quantity purchased. It is a fundamental tool for comparing offers that sell different quantities or packaging sizes, allowing for a direct comparison of value.

Rate Comparison

Rate comparison is the process of evaluating different offers by comparing their unit prices or rates to determine which option provides the best value. This method helps in making informed decisions when faced with various deals or promotions.

Cost Efficiency

Cost efficiency refers to obtaining the maximum benefit or value from spending by choosing the option with the lowest cost per unit. It is a crucial aspect of economic decision-making that helps consumers identify the best buy among multiple choices.

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