Question

The number of miles driven varies directly with the number of hours in the car. Billy drives 171 miles in 3 hours, so he could drive _____ miles in 4.5 hours.

Answer 1

Remember that direct variation means that you have a relationship of the form
$y=kx$

In this case it's a special equation, namely distance=rate*time. So first we have to find the rate given the information in the problem:
$171=3r$
$57=r$

Now we know that the rate is constant since Billy's distance varies directly with time. The next step is to find distance given a different amount time:
$d=57*4.5$

You can finish that one off!

Answer 2

Answer:

Step-by-step explanation:

Amillo