Question
Write inequalities to represent the situations below. \[ \begin{array}{l}\text { The vehicle's fuel efficiency is no less than } 30 \text { miles per gallon. } \\ \text { Use } f \text { to represent the vehicle's fuel efficiency (in miles per gallon). } \\ \square \\ \text { To get the } 10 \% \text { discount, a shopper must spend at least } \$ 500 \text {. } \\ \text { Use } \mathbf{d} \text { to represent the spending (in dollars) of a shopper who gets the discount. } \\ \square\end{array} \]
Ask by Bob Carroll. in the United States
Jan 26,2025
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Answer
\[
f \geq 30 \quad \text{and} \quad d \geq 500
\]
Solution
Certainly! Here are the inequalities representing each situation:
1. **Vehicle's Fuel Efficiency**
The fuel efficiency \( f \) must be **no less than** 30 miles per gallon. This translates to:
\[
f \geq 30
\]
2. **Shopper's Spending for Discount**
To qualify for the 10% discount, the shopper's spending \( d \) must be **at least** \$500. This can be expressed as:
\[
d \geq 500
\]
---
**Summary of Inequalities:**
\[
\begin{align*}
f &\geq 30 \\
d &\geq 500
\end{align*}
\]
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Extra Insights
For the first situation regarding the vehicle's fuel efficiency, you can express it as: \[ f \geq 30 \] This inequality indicates that the fuel efficiency \(f\) must be greater than or equal to 30 miles per gallon. For the second situation concerning the shopper's spending to qualify for a discount, the inequality can be represented as: \[ d \geq 500 \] This means the amount \(d\) that the shopper spends must be at least $500 to receive the 10% discount.