Question

Sally is going on a vacation with her family. In 2 hours they travel 90.5 miles. If they travel at the same speed, write an equation that represents how far they will travel, d, in h hours

Answer 1

Let d= distance in miles

Let h= time in hours

45.25h= d

Answer 2

Answer:

$d=45.25h$

Step-by-step explanation:

This constant motion is represented by:

$d=st$

Where $d$ is distance, $s$ is speed and $t$ is time.

We know that in 2 hours they travel 90.5 miles, this gives us a speed of:

$s=\frac{d}{t}=\frac{90.5}{2}mi/hr=45.25mi/hr$

But, the problem is asking for a general expression:

$d=st\\d=\frac{90.5}{2}t\\ d=45.25h$

Therefore, they travel a distance $d$ in $h$ hours, according to the expression

$d=45.25h$