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Kisachek [45]
3 years ago
15

Which are the center and radius of the circle with this equation? x^2 - 4x + y^2 + 2y = 0

Mathematics
1 answer:
natulia [17]3 years ago
7 0

Answer:

C = (2, - 1)

r \:  =  \:  \sqrt{5}

Step-by-step explanation:

Look at the picture

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Can someone please help with #16
ollegr [7]

Answer:

∠ WZX = 50°

XW is not an altitude.

Step-by-step explanation:

16. See the attached figure.

XW is the angle bisector of ∠ YXZ, hence, ∠ WXY = ∠ WXZ

Now, given that ∠ YXZ = 8x + 34 and ∠ WXY = 10x - 13

Hence, ∠ YXZ = 2 ∠ WXY

⇒ 8x + 34 = 2(10x - 13)

⇒ 8x + 34 = 20x - 26

⇒ 12x = 60

⇒ x = 5.

Hence, ∠ XZY = ∠ WZX = 10x = 50° (Answer)

Now, ∠ WXZ = ∠ WXY = 10x - 13 = 37°

Hence, from Δ WXZ,

∠ WZX + ∠ WXZ + ∠ XWZ = 180°

⇒ 50° + 37° + ∠ XWZ = 180°

⇒ ∠ XWZ = 93° ≠ 90°

Hence, XW is not an altitude. (Answer)

6 0
3 years ago
Please help me I just want to finish this so I can go to sleep.
nikdorinn [45]
The third and last options are the answers.
The graph is shifted to the right by some number. The coordinates aren't numbered, so it could be literally anything. To shift to the right, the equation will be |x-y| where y is any number.
6 0
3 years ago
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Solve:<br> 5y + 3y +1+1 = 2y + 6y +6 +2
lozanna [386]

Answer:

0=6

There are no solutions to this answer.

Step-by-step explanation:

8 0
3 years ago
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Round 86.74 to the nearest whole
zlopas [31]

Answer:

87

Step-by-step explanation:

7 0
4 years ago
I need the answer for this
Svetach [21]

Answer:

535.9 ft²

Step-by-step explanation:

Since there are 360° in a circle, and 240° is 2/3 of 360°, we can say that the area of the bolded sector is <em>2/3 the area of the whole circle</em>. The area of a circle with a radius of r is πr², or approximately 3.14r², so the area of the whole circle is ≈ 3.14(16)² = 3.14(256) = 803.84 ft². Taking 2/3 of this gets us 803.84 * (2/3) ≈ 535.9 ft²

6 0
3 years ago
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