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marishachu [46]
2 years ago
7

The graph shows the distance, y in miles, of a moving train froma station for a certain period of time, x, in hours:

Mathematics
1 answer:
nlexa [21]2 years ago
7 0
The constant speed or the mph is 150 miles per hour
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Please help I don’t understand this
enyata [817]

Answer:

  d. √(1/(x+1))

Step-by-step explanation:

Just as operations can be performed on numbers and variables, so can operations be performed on functions. Here, you're asked to simplify the ratio of two functions.

  \displaystyle\left(\frac{g}{f}\right)(x)=\frac{g(x)}{f(x)}=\frac{\sqrt{x-1}}{\sqrt{x^2-1}}=\sqrt{\frac{x-1}{x^2-1}}

At this point, you're supposed to know the factoring of the difference of squares:

  \displaystyle=\sqrt{\frac{x-1}{(x-1)(x+1)}}=\boxed{\sqrt{\frac{1}{x+1}}}

4 0
2 years ago
there are 864 students in a ninth grade class. there are 48 more boys than girls. how many boys are are there?
Arturiano [62]

Answer:

I believe it is 384, but I am not positive.

Step-by-step explanation:

Hope this helps, have a great day!

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3 years ago
5 Divided by 35.15?<br> Sorry if I spam a lot of questions it’s my final exam for school.
Orlov [11]
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3 years ago
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kicyunya [14]

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10500

Step-by-step explanation:

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PLZ HELP! Determine the value of k. Round your answer to the nearest hundredth if necessary.
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Answer:15

Step-by-step explanation

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