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Lera25 [3.4K]
3 years ago
13

Whats the answer to this?

Mathematics
1 answer:
mars1129 [50]3 years ago
4 0

Answer:

15 degrees

X is an Acute Angle

Step-by-step explanation:

x+ 75 = 90

x =15

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A standard chemistry examination administered nationally by the American Chemical Society has a mean of 500 and a standard devia
Maslowich
Let X be a random sample representing the score of a student in the American Chemical Society Examination.
P(450 < x < 500) = P((450 - 500)/(90/sqrt(25)) < z < (500 - 500)/(90/sqrt(25))) = P(-2.778 < z < 0) = P(z < 0) - P(z < -2.778) = P(z < 0) - [1 - P(z < 2.778)] = P(z < 0) + P(z < 2.778) - 1 = 0.5 + 0.99727 - 1 = 0.49727 = 49.7%
4 0
3 years ago
Which is equivalent sin^-1 (cos(pi/2))?Give your answer in radians
NNADVOKAT [17]

Answer:

Given the expression: \sin^{-1}(\cos(\frac{\pi}{2}))

Let the value of the given expression in radians be \theta

then;

\sin^{-1}(\cos(\frac{\pi}{2})) =\theta

\cos \frac{\pi}{2} = \sin \theta              ......[1]

We know the value of \cos \frac{\pi}{2} = 0

Substitute the given value in [1] we have;

\sin \theta = 0

Since, the value of \sin \theta is 0, therefore, the value of \theta is in the form of:

\theta = n\pi ; where n is the integer.

At n =0, 1 and 2, {Since, n is the integer}

Value of  \theta =0, \pi and 2\pi

therefore, the answer in radians either   0 , \pi or 2\pi


6 0
3 years ago
Read 2 more answers
Which arrow is pointing to the horizontal axis title?
cricket20 [7]

Answer:

is there a graph which shows the axis title or the arrow pointing to the axis title if so i would love to help with this question !!!

Step-by-step explanation:

<em>Angie <3 be the best you be different from the rest be inspired </em>

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3 years ago
NEED THIS QUICK, WILL GIVE BRAINLIEST
grin007 [14]

Answer:

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Step-by-step explanation:

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3 years ago
Ive been at this for abt 30 min. help?
gregori [183]

Answer:

1+\frac{-63}{x^2-1}

Step-by-step explanation:

If you foil this equation you will get:

\frac{(x+8)(x-8)}{(x+1)(x-1)}

And by dividing it, you will get;

1+\frac{-63}{x^2-1}

That is your answer!

6 0
3 years ago
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