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3 years ago

If f(x)=x^2+4x-12. find f(2)

Mathematics

1 answer:

kaheart [24]3 years ago

5 0

Answer:

f(2) = 28

Step-by-step explanation:

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Please help me with this.

ipn [44]

-5yards+-8yards=-13yards

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3 years ago

The Red Rox have won 3 World Series titles in the last 11 years. At this rate, how long will it take them to win 20 World Series

Alex787 [66]

Answer:

73 1/3 years

Step-by-step explanation:

3 WST = 11 years FInd the unit rate

1 WST = 11/3

20 WST = 220/3 or 73 1/3 years

<h3><u><em>Hope this helps!!! </em></u></h3><h3><u><em>Please mark this as brainliest!!! </em></u></h3><h3><u><em>Thank You!!! </em></u></h3><h3><u><em>:)</em></u></h3>

8 0

3 years ago

Find sinϴ and cosϴ if tanϴ=1/4 and sinϴ>0

eduard

If you're using the app, try seeing this answer through your browser: brainly.com/question/2787701

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$\mathsf{tan\,\theta=\dfrac{1}{4}\qquad\qquad(sin\,\theta\ \textgreater \ 0)}\\\\\\
\mathsf{\dfrac{sin\,\theta}{cos\,\theta}=\dfrac{1}{4}}\\\\\\
\mathsf{4\,sin\,\theta=cos\,\theta\qquad\quad(i)}$

Square both sides:

$\mathsf{(4\,sin\,\theta)^2=(cos\,\theta)^2}\\\\
\mathsf{4^2\,sin^2\,\theta=cos^2\,\theta}\\\\
\mathsf{16\,sin^2\,\theta=cos^2\,\theta\qquad\qquad(but,~cos^2\,\theta=1-sin^2\,\theta)}\\\\
\mathsf{16\,sin^2\,\theta=1-sin^2\,\theta}$

$\mathsf{16\,sin^2\,\theta+sin^2\,\theta=1}\\\\
\mathsf{17\,sin^2\,\theta=1}\\\\
\mathsf{sin^2\,\theta=\dfrac{1}{17}}\\\\\\
\mathsf{sin\,\theta=\pm\,\sqrt{\dfrac{1}{17}}}\\\\\\
\mathsf{sin\,\theta=\pm\,\dfrac{1}{\sqrt{17}}}$

Since $\mathsf{sin\,\theta}$ is positive, you can discard the negative sign. So,

$\mathsf{sin\,\theta=\dfrac{1}{\sqrt{17}}\qquad\quad\checkmark}$

Substitute this value back into $\mathsf{(i)}$ to find $\mathsf{cos\,\theta:}$

$\mathsf{4\cdot \dfrac{1}{\sqrt{17}}=cos\,\theta}\\\\\\
\mathsf{cos\,\theta=\dfrac{4}{\sqrt{17}}\qquad\quad\checkmark}$

I hope this helps. =)

Tags: <em>trigonometric identity relation trig sine cosine tangent sin cos tan trigonometry precalculus</em>

7 0

3 years ago

$42,050 increased by .25% monthly over 5 years

lidiya [134]

Answer:

6307.5

Step-by-step explanation:

Hope that helps!

5 0

3 years ago

What value for y makes this equation true?

3241004551 [841]

The answer is D. 48.

(3 x 40) + (3 x 8)
120 + 24
144

3 x Y = 144

Divide 144 by 3

144 / 3 = 48.
So the answer is 48.

Hope this helps!!

6 0

3 years ago

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