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Scorpion4ik [409]
4 years ago
13

Fill in the blanks 3 over 8 = 15 over something

Mathematics
2 answers:
Vikki [24]4 years ago
5 0
3/8=15/x.... => x=(8*15)/3=120/3=40. So 3/8=15/40
Viktor [21]4 years ago
4 0
\frac{3}{8}= \frac{15}{x} \\  \frac{3}{8} \frac{*5}{*5}= \boxed{\frac{15}{40}}
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4 cos²x – 1=0<br><br> What is the solution?
andreev551 [17]

Answer:

$x=\frac{\pi }{3}+2\pi n, n\in \mathbb{Z}$

$\:x=\frac{5\pi }{3}+2\pi n, n \in \mathbb{Z}$

$x=\frac{2\pi }{3}+2\pi n, n\in \mathbb{Z}$

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or

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Step-by-step explanation:

4\text{cos}^2(x)-1=0\\4\text{cos}^2(x)=1\\

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So, when cos(x) is equal to

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For

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We are talking about x = 60º and x = 300º, Quadrant I and IV, respectively. In radians:

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$\:x=\frac{5\pi }{3}+2\pi n, n \in \mathbb{Z}$

or

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For

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We are talking about x = 120º and x = 240º, Quadrant II and III, respectively. In radians:

$x=\frac{2\pi }{3}+2\pi n, n\in \mathbb{Z}$

$\:x=\frac{4\pi }{3}+2\pi n, n \in \mathbb{Z}$

or

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6 0
3 years ago
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Answer:

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8 0
3 years ago
It takes 20 hours and $400 to interview a candidate, and it takes 120 hours and $3600 to train an employee. A company has less t
zavuch27 [327]
<span>Let C denote the number of candidates they interview and E the number of employees they train.
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3 0
3 years ago
What's the answer ?<br><br><br><img src="https://tex.z-dn.net/?f=%20%5Csqrt%7B7%20%5Ctimes%20343%7D%20" id="TexFormula1" title="
Arturiano [62]

Answer:

49

Step-by-step explanation:

\sqrt{7(343)}

= \sqrt{2401}

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4 0
3 years ago
Read 2 more answers
Which ordered pair is a solution to the inequality 7x-3y&gt;10
dusya [7]

Answer:

first one

Step-by-step explanation:

5 0
3 years ago
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