3 years ago

Describe the graph represented by the equation r=12/4+8sin theta

Mathematics

1 answer:

Nadusha1986 [10]3 years ago

3 0

Answer:

Hyperbola, with horizontal diretrix at a distance of 3/2 units above the pole

Step-by-step explanation:

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OLEGan [10]

Answer:

$\cos\ A = \frac{2}{4.5}$

Step-by-step explanation:

Given

$sin\ A = \frac{2}{4.5}$

See attachment

Required

Explain and correct the error

The error in the equation is that: the formula of cosine of angle A is used to calculate the sine of angle A.

The ratio can be corrected as by using:

$\cos\ A = \frac{Adjacent}{Hypotenuse}$

$\cos\ A = \frac{AC}{AB}$

$\cos\ A = \frac{2}{4.5}$

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3 years ago

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Ugo [173]

I would go with answer D

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Your friend tells you that if you let her keep 2020 of your Pokemon cards for three months, she will give you 22 cards extra whe

Dmitrij [34]

Answer: 40 %

Step-by-step explanation:

Let the amount of one card = x

Hence, the value of 20 cards ( Principal amount ) = 20x

And, the value of 22 cards ( Total amount after 3 month ) = 22x

⇒ Total interest in 3 month = 22x - 20x =2x

Let the annual interest rate = r %

$\frac{20x\times r\times 3/12}{100}=2 x$ ( By the formula of simple interest rate )

$\implies \frac{10\times r\times 1/4}{100}=1$

$\implies \frac{10r}{400}=1$

$\implies 10r=400$

$\implies r=40\%$

Hence, the annual rate of interest = 40%

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3 years ago

Given a∥b , and c is not parallel to a or b, which statements must be true?

Lana71 [14]

because A & B are parallel

3=7 and 1=8 are true

the first 2 are the only ones that are true

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vampirchik [111]

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