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love history [14]
3 years ago
5

What is the equation of a circle with center (2,-8) and radius 9?

Mathematics
2 answers:
oksian1 [2.3K]3 years ago
7 0

Answer:

x2+y2-4x+16y-13

Step-by-step explanation:

center (h,k)=2,-8

radius(r)=9

we know

(x-h)2+(y-k)2=r2

now insert above given information

(x-2)2+(y+8)2=9×9

leonid [27]3 years ago
4 0

Answer:

9^2= (x+2)^2+(y+8)^2

Step-by-step explanation:

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

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P = 2L + 2W
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4 years ago
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Which relationship is always true for the angles x, y, and z of triangle ABC?
noname [10]

Answer:

y + z = x

Step-by-step explanation:

Let's rename angle BAC to w. Now, we have four angles: w, x, y, and z. We know that w + y + z has to equal 180 degrees, because a triangle's three angels always adds up to 180 degrees. We also know that w + x equals 180 degrees, because they are on the same line. These two phrases are equal:

w + y + z = w + x

We can then cancel w on each side:

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Hope this helps! :)

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3 years ago
Determine whether the given procedure results in a binomial distribution​ (or a distribution that can be treated as​ binomial).
MArishka [77]

Answer:

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Step-by-step explanation:

The first criterion of a binomial distribution is a fixed number of trials.  Selecting 5 senators means the number of trials is 5, which is a fixed number.

The next criterion is that the trials must be independent.  Selecting the senators without replacement means the trials are dependent, not independent; this means that this is not a binomial distribution.

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A restaurant offers a choice of 4 salads, 9 main courses, and 4 desserts. How many possible 3-course meals are there
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Answer:

144

Step-by-step explanation:

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