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castortr0y [4]
2 years ago
13

For triangle ABC with sides a,b and c the law of cosines states

Mathematics
1 answer:
grigory [225]2 years ago
6 0

Answer:

SAS

Step-by-step explanation:

Looking for the third side given the other two sides and the angle between them

c² = a² + b² - 2abcosC

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goldfiish [28.3K]

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Step-by-step explanation:

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6 0
2 years ago
Solve the system using elimination.<br> 2x + 18y = -9<br> 4x + 18y = -27
Elan Coil [88]

First, let's cancel out the x by multiplying 2x + 18y = -9 by -2.

-2 ( 2x + 18y = -9) = -4x -36y = 18

Then, we combine the two equations.

-4x + 4x = 0

18y - 36y = -18y

-27 + 18 = -9

Our new equation is -18y = -9.

Now, divide both sides by -18.

-18y / -18 = y

-9/ -18 = 1/2

y = 1/2

We can plug in a value for y since y = 1/2 now.

Let's use 2x + 18y = -9

Plug in y.

2x + 18(1/2) = -9

2x + 9 = -9

Then, subtract 9 from both sides.

2x = -18

Divide by 2.

2x/2 = x

-18/2 = -9

x = -9

Lastly, we can plug in both x and y values to see it works.

2(-9) + 18(1/2) = -9

-18 + 9 = -9

Therefore, the values of x and y does work.

x = -9

y = 1/2

4 0
3 years ago
Can someone help me on this?
Vinil7 [7]

Answer:

12√2

Step-by-step explanation:

45-45-90 special right triangles follow the form of x,x,x√2

Where both the sides that are across from the same angle (45) are equal in length and the hypotenuse is that value multiplied by the √2

6 0
3 years ago
Read 2 more answers
Choose the formula for the volume of a cone V=1/3
mote1985 [20]
If you know the cone volume and the cone radius, then
height = 3*Volume / PI * r^2

answer is D


3 0
2 years ago
In how many ways can aling rosa arrange 6 potted plants in a row?
horsena [70]
6 potted plants can be arranged 720 different ways.
3 0
3 years ago
Read 2 more answers
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