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ira [324]
3 years ago
15

This is dealing with special triangles

Mathematics
1 answer:
hram777 [196]3 years ago
3 0
All the sides of an equilateral triangle are the same, and all three angles are 60 degrees. If we want the height of the triangle, we can draw a vertical line straight down the center. This will bisect the top angle into two 30 degree angles and form a 90 degree corner at the base. The base will be split into two equal pieces. In this case 14 and 14 (half of 28).

To find the height, we can use a couple methods. First is Pythagorean Theorem which states that a^2 + b^2 = c^2. We know c = 28 and a = 14, so we can solve for the height. b = sqrt(28^2 - 14^2) = sqrt(588).. 588 can be factored into 196 and 3. So we can simplify the radical to 14sqrt(3).

The second way to find the height is to use trigonometry. We can use cos(30) = h/28 and solve for h to get h = 28cos30 or 14sqrt(3).

---

The next problem is asking the same thing. The altitude is the height. So use either of the methods above to get 2sqrt(3).
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What is the mean of the data set? 12, 17, 16, 10, 20, 13, 14, 14, 12, 12, 19, 18 a.14.75 b.15.75 c.13.50 d.14.00 need answer asa
cricket20 [7]
If you add them all up and divide it with how many different numbers you have then you get 13.5 (C)
7 0
3 years ago
Solve for me pls :)
I am Lyosha [343]

Answer:

<h2>f(19) =  -  \frac{27}{7}  \\</h2>

Step-by-step explanation:

f(x) =  \frac{3}{x + 2}  -  \sqrt{x - 3}  \\

To find f(19) , substitute the value of x that's 19 into f(x). That is for every x in f (x) replace it with 19

We have

f(19) =  \frac{3}{19 + 2}  -  \sqrt{19  - 3}  \\  =  \frac{3}{21}  -  \sqrt{16}  \\  =   \frac{1}{7}  - 4 =  \frac{1 - 28}{7}

We have the final answer as

f(19) =  -  \frac{27}{7}  \\

Hope this helps you

8 0
3 years ago
Given data below, what is the mean absolute deviation? <br> 58,88,40,60,72,66,80,48
JulijaS [17]
Mean is 64 and the mean absolute deviation is 12.5
3 0
4 years ago
As an estimation we are told £3 is €4.<br> Convert £18 to euros.
Yuri [45]

Answer:

€24

Step-by-step explanation:

We can use ratios to solve this.

3:4 = 18:x

Cross multiply: 3x = 18*4

Divide: x = 18*4/3

Simplify: x = 6*4 = 24

5 0
2 years ago
Question 1 of 15<br> Solve 18x+62 12x+18.<br> A. x ≥ 4<br> B. x≤ 4<br> C. x≤2<br> D. x ≥ 2
Alborosie

Answer:

18+62=80x

12+18=30x

x=80÷30=2

x>2

4 0
2 years ago
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