Train B travels at an average speed that ranges from 60 miles per hour to 90 miles per hour. Which inequality correctly represents all the potential values of the average speed, s, of the train?

Answer Choices

Correct answer marked below

|s – 15| ≥ 75

|s – 15| ≤ 75

|s – 75| < 25

|s – 75| ≤ 15

Correct

|s – 75| ≥ 15

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Official Explanation

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The average speed of train B is between 60 and 90 miles per hour. This means that the average speed, s, must satisfy the inequality 60 ≤ s ≤ 90. To express this in…

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Comments

ananyaJan 12, 2025

thanks

LavnishNov 11, 2024

This is definitely a test-day trap

joaquinMay 3, 2025

thanks for the answer

What this question tests

What it tests

Your ability to solve and combine linear inequalities and reason about ranges of values.

Common trap

Failing to flip the inequality sign when multiplying or dividing by a negative, or missing an inclusive/exclusive endpoint.