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vodomira [7]
3 years ago
7

What is the radius of the circle x^2+6x + y^2– 12y = 36?

Mathematics
1 answer:
bija089 [108]3 years ago
4 0

Answer:

Step-by-step explanation:

hello :

x²+6x + y²– 12y = 36

completed to suqard :(x²+6x) + (y²– 12y) = 36 means :

(x²+6x+9)-9 + (y²– 12y+36)-36 = 36

(x+3)²+(y-6)² = 9².... standard form when the radius is : 9

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Find the area of the following shape. You must show all work to receive credit A (-4, 0), B(0, 4), C(2, 2), D(1,0)
natulia [17]

9514 1404 393

Answer:

  13 square units

Step-by-step explanation:

See the attached figure.

The horizontal dashed line divides the figure into two pieces:

  • a triangle 4 wide and 2 high
  • a trapezoid 2 high with bases 5 and 4

The appropriate area formulas can be used to find the areas of these. The figure's area will be their sum.

  A = (1/2)bh = (1/2)(4)(2) = 4 . . . . square units

  A = (1/2)(b1 +b2)h = (1/2)(5 +4)(2) = 9 . . . . square units

The area of the shape is ...

  (4 +9) square units = 13 square units

7 0
3 years ago
the temperature in november was less than 55 degrees every day which inequality shows the temperature in november
grin007 [14]

Answer:

a. x < 55

Step-by-step explanation:

We know that the temperature in November was less than 55° every single day, we are then asked to find which inequality out of the four given shows the temperature in November.

To do so, take the most crucial information, "the temperature in November was less than 55° every single day." The words "less than" makes us know that we will be using the sign "<". Looking at the answers, we see only one that uses it, and that is a.

Therefore a is the correct answer.

8 0
3 years ago
What number makes the the number sentence true 420,008 - 9,569 =n
LekaFEV [45]
N=410,439
You can just type your problem into a calculator-- you're just finding out what 420,008-9,569 is. :)
4 0
3 years ago
Read 2 more answers
Can someone help me with this problem?????
snow_tiger [21]

The perimeter is composed of two straight parts and two semicircles. We can use this to break down the problem.

We can find the straight parts easily. They are given in the problem.

straight parts: 82 x 2 = 164 m

The two semicircles make a circle. We just have to find the circumference of a circle with a diameter of 66 cm to get the length of the semicircles.

semicircles: 2(π)(66/2) = 66(3.14) = 207.24 m

answer: 164+207.24 = 371.24 m

7 0
3 years ago
If the mean of 25, 28, a, 30 and 32 is 27, then find the value of a.
Anna11 [10]

Answer:

a = 20

Step-by-step explanation:

The mean is calculated as

mean = \frac{sum}{count}

          = \frac{25+28+a+30+32}{5}  = \frac{115+a}{5}

Then

\frac{115+a}{5} = 27 ( multiply both sides by 5 to clear the fraction )

115 + a = 135 ( subtract 115 from both sides )

a = 20

6 0
3 years ago
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