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3 years ago

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Two trains leave towns 1370 kilometers apart at the same time and travel toward each other. One train travels 18 km/h faster tha

n the other. If they meet in 5 hours, what is the rate of each train?

1 answer:

inna [77]3 years ago

6 0

Answer:

you have to divide the kilometers by the first train km/h and you should get the rate of each train

Step-by-step explanation:

hope it helps

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Please tell me what this is (correct answer)

Kamila [148]

Answer:

3.17

Step-by-step explanation:

0.45x + 0.72 + 5x = 18

5.45x = 17.28

x = 3.17

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3 years ago

Please solve the eqution<br> Cos4x + cos2x - 2 =0

horrorfan [7]

cos4x = cos2x

We know that:

cos2x = 1-2cos^2 x

==> cos4x = 1-2cos^2 (2x)

Now substitute:

==> 1-2cos^2 (2x) = cos2x

==> 2cos^2 (2x) + cos2x - 1 = 0

Now factor:

==> (2cos2x -1)(cos2x + 1) = 0

==> 2cos2x -1 = 0 ==> cos2x =1/2 ==> 2x= pi/3

==> x1= pi/6 , 7pi/6

==> x1= pi/6 + 2npi

==> x2= 7pi/6 + 2npi

==> cos2x = -1 ==> 2x= pi ==> x3 = pi/2 + 2npi.

<span>==> x= { pi/6+2npi, 7pi/6+2npi, pi/2+2npi}</span>

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3 years ago

Alice skates 2/5 mile in 1/5 hour. Elizabeth skates 2/3 mile in 2/9 hour. How far did elisabeth escape in in 1 hour?

sergeinik [125]

$Question$

Alice skates 2/5 mile in 1/5 hour. Elizabeth skates 2/3 mile in 2/9 hour. How far did elisabeth escape in in 1 hour?

Answer:

The Correct Answer is $\frac{8}{9}$

Complete the multiplication and the equation becomes

$\frac{2}{9}$ + $\frac{2}{3}$ = ?

The two fractions now have like denominators so you can add the numerators.

$\frac{2+6}{9}$ = $\frac{8}{9}$

Therefore, The Answer Is $\frac{8}{9}$

Hope this helps!

$xXxAnimexXx$

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3 years ago

mr Rowley has 16 homework papers and 14 exit tickets to return ms rivera had 64 homework papers and 60 exit tickets to return fo

melomori [17]

Mr. Rowley: 16:14 which reduces to 8:7
Ms. Rivera: 64:60 -> 16:15
The ratios are not equivalent because when they are reduced, they do not equal the same thing.

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3 years ago

A retail store is buying a 500 count for a device and another 200 count for another version of the same device that costs $100 l

iVinArrow [24]

Answer less than 250

Step-by-step explanation:

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3 years ago

Read 2 more answers