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lapo4ka [179]
3 years ago
14

Please help. Trig: Laws of Cosines

Mathematics
1 answer:
ladessa [460]3 years ago
8 0

Answer:

16.2 units

Step-by-step explanation:

Greater angle: 180 - 72 = 108

D² = 10² + 10² - 2(10)(10)cos(108)

D² = 261.8033989

D = 16.18033989

You might be interested in
Are the equations 3x= -9 and 4x= -12 equivalent
Hitman42 [59]
Yes they are equivalent. You get -3 when you try solving the actual equation.
5 0
4 years ago
Solve 12x-5>-2 please
Stells [14]

Answer:

x >  \frac{1}{4}

Step-by-step explanation:

12x - 5 >  - 2

Lets add +5 in both the sides.

=  > 12x - 5 + 5 >  - 2 + 5

=  > 12x > 3

Now lets divide 12 on both the sides.

=  >  \frac{12x}{12}  >  \frac{3}{12}

=  > x >  \frac{1}{4}

8 0
3 years ago
Anybody know how to do Special Right Triangles for geometry if so could you explain how to do it.
Lina20 [59]
Step 1: This is a right triangle with two equal sides so it must be a 45°-45°-90° triangle. Step 2: You are given that the both the sides are 3. If the first and second value of the ratio x:x:x√2 is 3 then the length of the third side is 3√2. Answer: The length of the hypotenuse is 3√2 inches.

3 0
3 years ago
The following list shows how many brothers and sisters some students have:
Mrac [35]

Answer:

4

Step-by-step explanation:

4 0
3 years ago
Read 2 more answers
What is the slope of 6x + 3y =15?
frozen [14]

Answer:

<h2>The answer is - 2</h2>

Step-by-step explanation:

Equation of a line is y = mx + c

where

m is the slope

c is the y intercept

To find the slope we must first write the equation in the general equation above

That's

6x + 3y = 15

<u>Make y the subject</u>

Send 6x to the other side of the equation

3y = - 6x + 15

<u>Divide both sides by 3</u>

\frac{3y}{3}  =  -  \frac{6}{3} x +  \frac{15}{3}

We have

y = - 2x + 5

Comparing with the general equation above

Slope / m = - 2

Hope this helps you

5 0
3 years ago
Read 2 more answers
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