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VladimirAG [237]
3 years ago
10

What is the right answer

Mathematics
1 answer:
Nadusha1986 [10]3 years ago
7 0

I think the correct answers are the 1st, 3rd and 5th options.

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Geometry help, will mark brainliest
andreyandreev [35.5K]

Answer:

265.1 units²

Step-by-step explanation:

Area of circle:

3.14 × 12²

452.16

Side of the triangle:

s² = 12² + 12² - 2(12)(12)cos(120)

s² = 432

s = 12sqrt(3)

Area of triangle:

½ × s × s × sin(60)

½ × 432 × sqrt(3)/2

187.0614872

Shaded area:

452.16 - 187.0614872

265.0985128 units²

4 0
2 years ago
Two systems of equations are shown below: System A System B 3x + 2y = 3 −x − 14y = 1 −2x − 8y = −1 −2x − 8y = −1 Which of the fo
Sauron [17]

The two linear equations represented in system A as :

3 x + 2 y =3   -------(1)

- 2 x - 8 y = -1  ------(2)

(1) × 2 + (2) × 3 gives

⇒ 6 x + 4 y - 6 x - 24 y = 6 -3

⇒ - 20 y = 3

⇒ y = \frac{-3}{20}

Putting the value of y in equation (1), we get

3 x  - \frac{6}{20}=3\\\\ 3 x= \frac{66}{20} \\\\ x=\frac{11}{10}

Two linear equation represented in system B is:

3.   -x - 14 y =1

4.   - 2 x - 8 y = -1

-2 ×Equation (3) + Equation (4)=

2 x +28 y- 2 x - 8 y= -2 -1

⇒ 20 y = -3

⇒y =\frac{-3}{20}

Putting the value of y in equation (3),we get

-x + \frac{42}{20}=1 \\\\ x=\frac{22}{20}=\frac{11}{10}

As Two system , that is system (A) and System (B) has same solution.

By looking at all the options , i found that Option (D) is correct. The two system will have the same solution because the first equation of System B is obtained by adding the first equation of System A to 2 times the second equation of System A.

6 0
3 years ago
Read 2 more answers
A bag contains 4 red marbles and 5 blue marbles. If two marbles are chosen at random, one at a time and without replacement, wha
Law Incorporation [45]

|\Omega|=9\cdot8=72\\ |A|=4\cdot3=12\\\\ P(A)=\dfrac{12}{72}=\dfrac{1}{6}\approx17\%

7 0
3 years ago
Ok last question for today <br> Will mark brainliest
Pepsi [2]

Answer:9


Step-by-step explanation:

8 * 9 = 72

8, 16, 24, 32, 40, 48, 56, 64, 72

1, 2, 3, 4, 5, 6, 7, 8, 9

3 0
3 years ago
Help me please for 10pt
balandron [24]

Answer:

The answer is A

Step-by-step explanation:

6 0
2 years ago
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