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Kazeer [188]
3 years ago
10

Can somebody please help me with 3 and 5. Please don’t answer if you are not sure. 17 points

Mathematics
1 answer:
otez555 [7]3 years ago
7 0
The Pyth. Thm. tells us the following:  (hypo)^2 = (leg 1)^2 + (leg 2)^2.
Here the hypo is 75 miles.  One train traveled x miles and the other x+10 miles.

applying the Pyth. Thm., 

x^2 + (x+10)^2 = 75^2

which becomes   x^2 + x^2 + 20x + 400 = 5625, or
                               2x^2 + 20x - 5225 = 0.

Choose a method easy for you that will lead to a solution (x-value).
Using "completing the square," I obtained x= 47.8 miles and x = 57.8 miles.  I

It's very important to check one's work.  Suppose x = 47.8 miles.  Then x+10 = 57.8 miles.

47.8^2 + 57.8^2 = 75^ must be true.  Is it?

2284.84 + 3340.84           5625
          5625.6      is approx equal to 5625.  Close enough.

The first train traveled 47.8 miles and the second 57.8 miles.
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In the statement 10 + 0 = 0 + 10 how would you describe the zero (0)?​
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A doctor prescribes 150 milligrams of a therapeutic drug that decays by about 15% each hour. To the nearest hour, what is the ha
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Answer:

4 hours

Step-by-step explanation:

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2 years ago
Branliest and 30 points
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1.
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Final answer: 9/16

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Final answer: 17.4

3.
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Final answer: 6.7
3 0
3 years ago
Read 2 more answers
BRAINLY FOR THE FASTEST WITH GOOD EXPLANATIONS
Neporo4naja [7]

So, when we're tasked with things like this, rewriting everything in terms of sine and cosine and combining fractions often trivializes things, so doing just that gives us:

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So out expression is 1/cos(x).

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