Homework Help: Algebra 1

Posted by Libby on Thursday, February 7, 2008 at 4:15pm.

It takes a lot of snow ofr the federal government in Washington D.C. to shut down, but even they experienced a two-hour delay last Friday. This is to allow people to take it slow in thier way to work. A commute to work that usually takes someone 24 minutes traveling at an average speed of 37.5 mph, but that was not possible that day. On this snowy day, tha average rate of speed this peson could travel was only 15 mph due to conditions. How many minutes did the commute to work take?

I don't understand how to do this. Please help.
thank you!

Algebra 1 - Matt, Thursday, February 7, 2008 at 4:28pm
Since it takes 25 minutes at 37.5 MPH, we know that in 60 minutes, they would go 37.5 miles. We need to know how long to commute is. 25/60 = 5/12, so you multiply 37.5 by 5/12. The answer is 15.625, this is how long the commute is. 15 MPH is 4 minutes per mile, so you multiply 4 by 15.625, giving you 62.5

62.5 minutes.
Algebra 1 - Ms. Sue, Thursday, February 7, 2008 at 4:34pm
Let's start with changing 24 minutes to a fraction of an hour. 24/60 = 0.4

At an average speed of 37.5, then it normally takes a person 37.5 * 0.4 = 15 miles.

On a snowy day at 15 mph, it would take an hour to drive 15 miles.
- Algebra 1 - Libby, Thursday, February 7, 2008 at 4:45pm
  how do you get the 1 hour?
Algebra 1 - Ms. Sue, Thursday, February 7, 2008 at 4:45pm
At 15 miles per hour, you cover 15 miles in one hour.
- Algebra 1 - Libby, Thursday, February 7, 2008 at 4:48pm
  oh, ok thank you, I really appreciate it.
  - Algebra 1 - Ms. Sue, Thursday, February 7, 2008 at 4:54pm
    You're very welcome. :-)
Algebra 1 - aislynn, Monday, March 3, 2008 at 12:18pm
If a die and coin are tossed, what is the probability of rolling an even number on the die and heads on the coin?

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