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kifflom [539]
3 years ago
7

Two trains leave the same station at the same time, but are headed in opposite directions. One train travels at 70 mph and the o

ther train travels at 80 mph. How much times passes until the trains are 600 mi apart?
Mathematics
2 answers:
lidiya [134]3 years ago
7 0
Imagine you're on the first train. since you're moving away from second train at 70mph, and that train is moving away from you at 80mph, in total that other train for you is moving away at 150mph (as you are stationary inside the train).

if the two trains are moving apart at 150mph, then to be 600 miles apart it will take 600/150 hours, which you can calculate :)
Genrish500 [490]3 years ago
3 0

Answer:

Time = 4 hours.

Step-by-step explanation:

Since, both the train travels with the speed 70 and 80 mph from the same points in opposite direction.

Thus, we can take speed of train = 70 + 80 = 150 mph

Also, after some time distance between both train is 600 m

Thus, using the formula,

\text{Speed}=\dfrac{\text{Distance}}{\text{Time}}

⇒ \text{Time}=\dfrac{\text{Distance}}{\text{Speed}}

⇒ \text{Time}=\dfrac{\text{600}}{\text{150}}

⇒ Time = 4 hours.

Thus, After 4 hours both train will 600 m apart.

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2 years ago
Which equations have the same value of x as Three-fifths (30 x minus 15) = 72? Select three options.
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An equation is formed of two equal expressions. The correct options are C, D, and E.

<h3>What is an equation?</h3>

An equation is formed when two equal expressions are equated together with the help of an equal sign '='.

The value of x in the given equation is,

\dfrac35 (30x-15) = 72\\\\(6x - 3) = 72\\\\6x -3 = \dfrac{72}3\\\\6x = 24 + 3\\\\x = 4.5

Substitute the value of x in other option to check if the equations are equal are not. Therefore, the options can be written  as,

A.) 18x - 15 = 72

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Thus, this will not return the same value.

B.) 50x - 25 = 72

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Thus, this will not return the same value.

C.) 18x - 9 = 72

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Thus, this will return the same value.

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Thus, this will return the same value.

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Thus, this will return the same value.

Hence, the correct options are C, D, and E.

Learn more about Equation:

brainly.com/question/226398

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