Question

The average wind speed in another town is 23 km/h, but the actual wind speed is within 4 km/h of the average. Write and solve an inequality to find the range of wind speed in this town.

Answer 1

We already know the units (km/h), so let's just deal with the numbers and variables:

Average Wind Speed = \(W_{\text{avg}}\)
Actual Wind Speed = \(W_{\text{true}}\)

\(W_{\text{avg}} = 23\)

Answer 2

It says the actual wind speed is within 4 km/h of the average. This translates to:

\(W_{\text{avg}} - 4 < W_{\text{true}} < W_{\text{avg}} + 4\)

\(23 - 4 < W_{\text{true}} <23 + 4\)

Answer 3

So is that it??

Answer 4

Yes, technically though, you should probably use \(\le\) symbol. And the initial setup would be
\(|W_{\text{true} - W_{\text{avg}}| < 4} \)

Something is wrong with LaTeX

Answer 5

okay, thanks