Question

bernard typically runs x km/hour. while he was sick, he only ran 41.5 km/hour. what equation represents that the difference in his speeds is 13.5 km/hour?
○ x - 41.5 = 13.5
○ 41.5 + x = 13.5
○ 13.5 - x = 41.5
○ 13.5 - 41.5 = x

Explanation:

Step1: Analyze the relationship between speeds

Typical speed is \(x\) km/hour, sick - speed is \(41.5\) km/hour. The difference in speeds is \(13.5\) km/hour. Since typical speed is higher (as difference is positive), we use \(x-41.5\).

Step2: Form the equation

The difference \(x - 41.5\) is equal to \(13.5\). So the equation is \(x-41.5 = 13.5\).

Answer:

A. \(x - 41.5=13.5\)