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3 years ago

I NEED HELP PLEASE PLEASE PLEASE HELP ME !!!!

Mathematics

1 answer:

Ipatiy [6.2K]3 years ago

8 0

Answer:

(2, 4)

(-1/2, 7)

(0, 3)

Step-by-step explanation:

It is useful to plot the points on the graph. The three points that are in the doubly-shaded area or on the solid boundary line of it are in the solution set:

(2, 4)

(-1/2, 7)

(0, 3)

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Find the area of a regular nonagon with a side length of 9 and an apothem of 16

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Idk if i'm exactly right but i think it's 500.73

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3 years ago

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Answer:

18.21 cm^2.

Step-by-step explanation:

Area of the unshaded part

= area of the square - area of the quadrant

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3 years ago

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3 years ago

Convert the rectangular coordinates (4√3,−4) to polar form. Let r>0 and 0≤θ<2π.

spayn [35]

Answer:

(8,150)

Step-by-step explanation:

Polar form is in,

(r,theta).

To find r, apply pythagorean theorem using both coordinates to find r.

$(4 \sqrt{3} ) {}^{2} + ( - 4 {}^{2} ) = {r}^{2}$

$48 + 16 = {r}^{2}$

$r = 8$

To find theta, since we know the opposite and adjacent side, apply the tangent function.

$\tan(x) = \frac{ - 4}{4 \sqrt{3} }$

Apply inverse tan function

$\tan {}^{ - 1} ( \frac{ - 4}{4 \sqrt{3} } ) = - 30$

Since the degrees have to be in between 0 and 360. Add 180 to -30.

$- 30 + 180 = 150$

So the answer is

(8,150).

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3 years ago