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Viefleur [7K]
3 years ago
6

Two trains leave stations 238 miles apart at the same time and travel toward each other. One train travels at 95 miles per hour

while the other travels at 75 miles per hour. How long will it take for the two trains to meet. Do not round
Mathematics
1 answer:
horrorfan [7]3 years ago
3 0
The speed at which they are approaching each other is 95+ 75 = 170 mph.
so the required time  = 238/170  =  1.4 hours ( or 1 hour 24 minutes ).  I hope they were not on the same line!!
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Answer: Andre picked 252 lbs of apple

Step-by-step explanation:

Let x represent the number of pounds of apple that Jane picked.

Let y represent the number of pounds of apple that Andre picked.

Let z represent the number of pounds of apple that Maria picked.

Andre picks 3 times as many pounds as maria. This means that

y = 3z

z = y/3

Jane picks 2 times as many pounds as Andre. This means that

x = 2y

The total weight of the apples 840 ibs. This means that

x + y + z = 840 - - - - - - - - - -1

Substituting z = y/3 and x = 2y into equation 1, it becomes

2y + y + y/3 = 840

Cross multiplying by 3, it becomes

6y + 3y + y = 2520

10y = 2520

y = 2520/10 = 252

x = 2y = 2×252 = 504

z = y/3 = 252/3 = 84

6 0
4 years ago
Marco wrote the equation below.
vova2212 [387]

Answer:

It is true, because the cosine function has a period of 2π


Step-by-step explanation:

Since, the period of the cos function is 360° ( or 2π radians ), it holds the property of:

Cos(\theta)=Cos(2\pi +\theta)


Taking \theta as -\frac{\pi}{2}, (2\pi + \theta) is equal to  2\pi + (-\frac{\pi}{2})\\=2\pi - \frac{\pi}{2}\\=\frac{4\pi-\pi}{2}\\=\frac{3\pi}{2}

The equation is true!

<u>Note:</u> The cos function is even function


Hence, the equation is true, because the cosine function has a period of 2π, NOT because the cosine function is ODD, which it is not!!

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