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Ivenika [448]
3 years ago
7

3x squared +3y squared+12x-6y-21=0 is a concentric circle of what

Mathematics
1 answer:
Ivenika [448]3 years ago
4 0

Answer:

Centre of the circle has coordinates(-2,1) and the raduis = square root (12)

Step-by-step explanation:

Shown in the attachment for better understanding.

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The volume of clay used to build a cylindrical pillar with a height of 9 centimeters is 324 pi cubic centimeters. The area of th
Marta_Voda [28]

Answer:

36 (Fill 3 in the blank)

Step-by-step explanation:

Given:

Volume of a cylinder = 324 π

Height = 9 cm

The formula to find the volume of a cylinder = Base area * height.

Base is a circle. So the area of a circle = πr^2

Volume of the cylindrical pillar = πr^2 h

324 π = πr^2 . 9

πr^2 = 324 π /9

πr^2 = 36 π

The area of the base = 36 π

Thank you.

7 0
3 years ago
Read 2 more answers
What is the vertex of this equation?
AfilCa [17]

Answer:

  (5, 4)

Step-by-step explanation:

The equation can be written in vertex form by adding and subtracting 25:

  y = -(x^2 -10x +25) -21 +25

  y = -(x -5)^2 +4

Then the vertex can be identified as (5, 4).

7 0
3 years ago
Evaluate the expression for the given value of x.<br> 5x + 6 for x = 4
Brrunno [24]
If x=4, rewrite the equation which would be 5(4)+6

First you multiply 4 by 5 which would give you 20

Now put in the 6 in the equation

20+6

20+6=26

Therefore for the expression given the value of x would make your answer be 26

5 0
3 years ago
Find the value of x. *BRAINLIEST*<br><br> A. 10<br> B. 8.3<br> C. 7<br> D. 5
bekas [8.4K]
3x-5 is a midline of that triangle so:

3x-5=\dfrac{1}{2}\cdot20\\\\\\3x-5=10\\\\3x=15\quad|:3\\\\\boxed{x=5}

Answer D.
3 0
3 years ago
Please help thanks! Brainliest <br> Sorry for spamming.
Bad White [126]

Answer: −10

Step-by-step explanation: 9^2−21/−6

81−21/−6

60/−6

−10

6 0
3 years ago
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