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riadik2000 [5.3K]
2 years ago
15

Hộp I có 10 sản phẩm tốt, 2 hỏng; hộp II có 20 sản phẩm tốt, 4 hỏng. Chọn ngẫu nhiên một hộp, rồi từ đó lấy ta một sản phẩm.

Mathematics
1 answer:
GaryK [48]2 years ago
6 0

Answer:

60

Step-by-step explanation:

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Step-by-step explanation:

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A 5-foot tall person standing with her back to the sun casts an 12-foot long shadow. To the nearest degree, what angle does the
swat32

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  • 23°

Explanation:

<u>1) Data:</u>

a) height of the person = opposite-leg to the angle the sun makes with the ground = 5 ft

b) length of the shadow = adjacent-leg to the angle the sun makes with the ground = 12 ft

c) angle, α = ?

<u>2) Solution</u>

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The equation of a circle is x^2+y^2-2x +6y-6=0. Find the center and radius of the circle by completing the square.you must inclu
zavuch27 [327]

Answer:

The center of the circle is at;

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The radius of the circle is;

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Given the equation of circle;

x^2+y^2-2x+6y-6=0

we want to re-write it in the form;

(x-h)^2+(y-k)^2=r^2

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\begin{gathered} (h,k)\text{ is the center of the circle} \\ r\text{ is the radius} \end{gathered}

Applying Completing the square method;

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comparing the derived equation to the general form we have;

\begin{gathered} h=1 \\ k=-3 \\ r=4 \end{gathered}

Therefore;

The center of the circle is at;

(1,-3)

The radius of the circle is;

r=4

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7 months ago
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