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max2010maxim [7]
3 years ago
8

What are the center and radius of a circle defined by the equation x^2+y^2- 6x+ 8y+ 21=0?

Mathematics
2 answers:
KengaRu [80]3 years ago
8 0

Answer:

It is B, Thank me later

Step-by-step explanation:


Natali5045456 [20]3 years ago
4 0
You have to complete the square. When you do this you get an equation that looks like this: (x-3)^2 + (y+4)^2 = 4. So your center is (3, -4) and your radius is 2. That looks like B to me!!!
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What is 2 times 2? It would be really helpful.
AfilCa [17]

Answer:

2*2=4

Step-by-step explanation:

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3 years ago
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Ilia_Sergeevich [38]

Answer:

3.1

Step-by-step explanation:

19.9 = 9y - 8

+8           +8

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/9        /9

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9(3.1) - 8 =

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3 years ago
(y 3 - y 2 + y + 3) ÷ (y + 1)
Rufina [12.5K]

Answer:

y^2-2y+3

Step-by-step explanation:

use synthetic division

-1| 1  -1  1  3

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3 0
2 years ago
Please Help!!!!!! Use what you've learned today about the sum of the interior angles of triangles and quadrilaterals to determin
sveta [45]

Answer:

m = 116

x = 24

y = 76

z = 40

Step-by-step explanation:

For startes the interior angles of triangles always add up to 180 degrees.

That means....

73 + 83 + x = 180

z + m + x = 180

z + y + 64 = 180

Another important fact is that two angles that are intersected by a line in the case 64 and m always add up to 180 degrees.

So m + 64 = 180

Let's start with 73 + 83 + x = 180

If you add 73 and 83 you get 156

x + 156 = 180 then subtract 156 from both sides and

x = 24

Then use m + 64 = 180 subtract 64 from both sides and

m = 116

z + m + x = 180 become

z + 116 + 24 = 180

Add 116 and 24 and you get 140

z + 140 = 180 subtract 140 from both sides and

z = 40

Check to make sure m + x + z = 180

24 + 40 + 116 = 180

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y + 40 + 64 = 180

40 + 64 = 104 so

y + 104 = 180 subtract 104 from both sides and

y = 76

Congratulations you have found all of the angles!

6 0
3 years ago
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3241004551 [841]

Answer:

Sorry

Step-by-step explanation:

I wish I knew

5 0
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