Thursday

July 24, 2014

July 24, 2014

Posted by **lisa** on Thursday, November 17, 2011 at 12:55pm.

- algebra -
**Henry**, Saturday, November 19, 2011 at 4:12pmVf = X mi/h.=Velocity of freight train.

Vp = (X + 18)mi/h = Velocity of passenger train.

Eq1: Dp = (X+18)t = 260.

Eq2: Df = Xt = 170,

t = 170/X.

In Eq1, substitute 170/X for t:

(X+18)170/X = 260,

Multiply both sides by X:

170(X+18) = 260x,

170x + 3060 = 260x,

260x - 170x = 3060,

90x = 3060,

X = 34 mi/h = Speed of freight train.

X+18 = 34 + 18 = 52 = Speed of passenger train.

**Related Questions**

algebra - The speed of a passenger train is 18mph faster than the speed of a ...

algebra 1b - the speed of a passenger train is 18mph faster than the speed of a ...

Algebra - Speed of passenger train is 6mph faster than the freight train. The ...

MATH Algebra - The speed of a passenger train is 6 mph faster than the speed of ...

algebra - the speed of a passenger train is 20mph faster than the speed of a ...

Algebra - The speed of a passenger train is 20 mph faster than the speed of a ...

Math - The The speed of a passenger train is 12 mph faster then the speed of a ...

algebra - The speed of a passenger train is 16 mph faster than the speed of a ...

algebra - a passenger train's speed is 60mi/h, and a freight train's speed is ...

algebra - A passenger train's speed is 60 mi/h, and a freight train's speed is ...