[MOVED] 2 cars, 330 mi apart, drive toward each other...

Simplificatation, evaluation, linear equations, linear graphs, linear inequalities, basic word problems, etc.
ddclaws
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[MOVED] 2 cars, 330 mi apart, drive toward each other...

Postby ddclaws » Mon Mar 16, 2009 8:26 pm

Two cars are 330 miles apart and moving toward each other. One is traveling at 10mph faster than the other. In 3hrs, the cars pass each other. What is the rate of each car?

I need the variable and what it stands for and the equation and it's solution.

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stapel_eliz
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Re: [MOVED] 2 cars, 330 mi apart, drive toward each other...

Postby stapel_eliz » Mon Mar 16, 2009 10:38 pm

ddclaws wrote:I need the variable and what it stands for and the equation and it's solution.

Sorry, but this isn't that sort of site. :roll:

But if you'd like to learn how to do this on your own....

ddclaws wrote:Two cars are 330 miles apart and moving toward each other. One is traveling at 10mph faster than the other. In 3hrs, the cars pass each other. What is the rate of each car?

First, you'll need to learn what variables are and how to "translate" relationships from English statements into algebraic expressions and equations. Once you have learned the basics, you may want to study how to set up and solve "distance" word problems.

At that point, you should be able to complete the following:

+--------+-----+--------+---+
|########| d = r * t |
+--------+-----+--------+---+
| faster | | r | 3 |
+--------+-----+--------+---+
| slower | | r + 10 | 3 |
+--------+-----+--------+---+

Use the "distance" equation explained in the lesson to create expressions for the distance each car covered. Then add their individual distances and set the sum equal to the given total. Solve the linear equation for the value of the variable. Back-solve for the required information.

If, after studying the lessons, you get stuck in working the exercise, please reply with a clear listing of your steps and reasoning so far. Thank you! :D


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