Question

Train a travels at 25 mph and train Beach Ave is at a greater speed of X miles per hour. Right and simplify an expression that represents how many miles farther train be travels in three hours.

Answer 1

The distance travelled by each train is given by the product between their speed and the amount of time travelled. For train A, its speed is 25 mph, therefore, in 3 hours the distance travelled is

`25*3=75`

75 miles.

For Train B, its speed is x mph, then, in 3 hours the distance travelled is

`3* x=3x`

The amount of miles farther train B be travels in three hours is the difference between the distance travelled by Train B and Train A. If we call the amount of miles farther train B be travels in three hours as d, we have the following expression

`d=3x-75`