Homework Help: Algebra

Posted by Nancy on Saturday, March 7, 2009 at 8:14pm.

1) Two cars leave town at the same time going in opposite directions. One travels 44 mi/h and the other travels 55 mi/h. In how many hours will they be 297 miles apart?

2) Two cars leave town at the same time going the same direction on the same road. One travels 32 mi/h and the other travels 47 mi/h. In how many hours will they be 69 miles apart?

Algebra - drwls, Saturday, March 7, 2009 at 8:42pm
1) The distance between them increases at a rate of 99 mph. Divide 297 miles by that number.

2) In this case, the distance between them increaes at a rate of 15 mph. Divide 69 miles by that number.
Algebra - Joy, Saturday, March 7, 2009 at 9:49pm
But what are the equations for me to solve them?
I need equations, that's what the directions are telling me.
Algebra - Damon, Saturday, March 7, 2009 at 10:03pm
separation speed = 44 + 55 = 99
99 t = 297

in time t, fast one goes 47 t

slow one goes 32 t
so
47 t - 32 t = 69

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