Posted by **rachel** on Saturday, October 24, 2009 at 4:38pm.

you are driving at a speed of 55 miles per hour to your sister's house. at 1pm, you are 150 miles from her house. write an equation that models the distance from you sister's house in terms of the number of hours since 1pm.

- algebra -
**jim**, Saturday, October 24, 2009 at 5:45pm
We need a variable for the time. Let's call that t. And we can call the distance d.

At t = 0 (1pm) you are 150 miles away, and as t increases, the distance decreases, so we need to subtract some multiple of t from 150 as we go.

We need something that starts with

d =

since the distance is what we want to know, and the right hand side will be like

150 - something * t

Of course, technically, we'd need to limit the domain of t; otherwise, after 10 hours, we'll be negative miles away.

## Answer this Question

## Related Questions

- algebra 1 - You are driving to your sister's house at 55 mph. At one pm, you are...
- algebra - Sam's sister lives 100 miles away. Sam drove 50 mph for 1/2 hr toward ...
- algebra - The question is: You plan on attending a picnic for the up coming ...
- math - Hannah took a trip yo visit her cousin. She drove 120 miles to reach her ...
- Alg 1 - Issa is driving to the airport to catch a flight to miami, and her ...
- Algebra - Mrs. Lewis plans to drive 900 miles to her vacation destination, ...
- pre-algebra - your family is driving to houston,texas.A sign indicates that you ...
- math - your family is driving to houston,texas.A sign indicates that you are 700...
- math - Tina and Jim live 5 miles apart from each other. Tina ran from her house ...
- algebra - Sheila leaves her home to go to her sister's house, which is a 24-mile...

More Related Questions