2 years ago

1. Resolve, em IR as equações seguintes:

1 answer:

5 0

Answer:

Logo, no intervalo [0°,360°] as soluções da equação sen2x=–senx . São: . 0°,120° ... k∈Z . S={x∈IR: X=(π\2)+2kπ , k∈Z } . b) arccos(2x²–1)=2arccos(1/2) .

Step-by-step explanation:

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Please help need answers ASAP! I will leave good reviews

ddd [48]

Answer: its not showing the

Step-by-step explanation:

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3 years ago

The Yoga class you wish to take is offering two price quotes: $108 for 5 weeks as (15 classes) or $125 for 8 weeks (24 classes).

AURORKA [14]

The answer is C)
108/15 - 125/24 = 1.99

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3 years ago

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(-3c+6) + (-c+8) simplify with a step by step please

mel-nik [20]

Step-by-step explanation:

$= ( - 3c + 6) + ( - c + 8)$

$= - 3c + 6 - c + 8$

$= - 3c - c + 6 + 8$

= -4c + 14

hence -4c + 14 is the answer ...

hope it helped !!

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2 years ago

if you start on the unit circle at (0,-1) and move 360° in the counterclockwise direction, at what angle measure on the unit cir

maks197457 [2]

Answer:

270°

Step-by-step explanation:

(0, -1) is at the 270° angle. If you do a 360°, you end up back where you started, so the angle is still 270°.

6 0

3 years ago

A quality-assurance inspector periodically exam-ines the output of a machine to determine whether it is properly adjusted. When

Stolb23 [73]

Answer:

Step-by-step explanation:

From the given information;

The null hypothesis & alternative hypothesis:

$\mathbf{H_o:\mu = 2} \\ \\ \mathbf{H_1 : \mu \ne 2}$

The test statistics can be computed as:

$Z = \dfrac{\overline x - \mu}{\dfrac{\sigma}{\sqrt{n}}}$

$Z = \dfrac{2.025- 2}{\dfrac{0.07}{\sqrt{35}}}$

$Z = \dfrac{0.025}{\dfrac{0.07}{\sqrt{35}}}$

$Z =2.11$

The p-value = 2(Z > 2.11) since this is a two-tailed test

The p-value = 2( 1 - Z < 2.11)

The p-value = 2 (1 -0.9826)

The p-value = 2 (0.0174)

The p-value = 0.0348

Decision Rule: To reject the $\mathbf{H_o}$ if the p-value is less than $\mathbf{H_o}$

Conclusion: We fail to reject $\mathbf{H_o}$ and conclude that the population mean = 2, thus the machine is properly adjusted.

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3 years ago