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nexus9112 [7]
3 years ago
9

Write an inequality for the given statement: The sum of x and 25 is less than 75.

Mathematics
1 answer:
Kaylis [27]3 years ago
4 0
That statement would be best express by " x + 25 < 75 ". Since the statement says the sum of x and 25, thus, it will be x + 25. Then it also states that the sum is less than 75, so the best expression would be " < 75".
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If you know that \sin\dfrac\pi3=\dfrac12, then you know right away

\tan\left(\sin^{-1}\dfrac12\right)=\tan\dfrac\pi3=\dfrac1{\sqrt}3=\dfrac{\sqrt3}3

###

Otherwise, you can derive the same result. Let \theta=\sin^{-1}\dfrac12, so that \sin\theta=\dfrac12. \sin^{-1} is bounded, so we know -\dfrac\pi2\le\theta\le\dfrac\pi2. For these values of \theta, we always have \cos\theta\ge0.

So, recalling the Pythagorean theorem, we find

\cos^2\theta+\sin^2\theta=1\implies\cos\theta=\sqrt{1-\sin^2\theta}=\sqrt{1-\left(\dfrac12\right)^2}=\dfrac{\sqrt3}2

Then

\tan\theta=\tan\left(\sin^{-1}\dfrac12\right)=\dfrac{\sin\theta}{\cos\theta}=\dfrac{\frac12}{\frac{\sqrt3}2}=\dfrac1{\sqrt3}=\dfrac{\sqrt3}3

as expected.

5 0
3 years ago
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The number of E.coli bacteria cells in a pond of stagnant water can be represented by the function below, where A represents the
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Answer:

  • <u>Option B. 59%</u>

Explanation:

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The base, 1.123, represents the multiplicative constant rate of change of the function, so you just must substitute 1 for t in the power part of the function:

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Answer:

>

Step-by-step explanation:

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<u>Want:</u>       Which fraction is larger?

To identify the size of a fraction, converting it into a fraction is easier

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<u>Choices:</u>

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> is greater than symbol

= is equal to

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Learn more about the Fractions at brainly.com/question/280013

<u>Visual Representation:</u>

<u />

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