Answer:
<em>Std. dev. = 3.46</em>
<u><em>Explanation:</em></u>
The standard deviation is the square root of the variance.
Given that, Varience of 10 numbers = 12
S.D = √V
Where,
S.D = Standard Deviation
V = variance
S.D = √12
S.D = 3.46
Both standard deviation and variance are derived from the mean of a given data set. If the mean is simply the average of all data points, the variance measures the average degree to which each point differs from the mean.
Answer:
16) x=13.5 17) x=17
Step-by-step explanation:
*The sum of the interior angles of a 5 sided polygon is 540 degrees.
16) The angle measures are 10x-1, 6x+5, 6x+5, 8x+9, and 8x+9. We add these values up to get 38x + 27. Because the sum of the interior angles must be 540, we set an equation of 38x + 27 = 540. From here, we can make it 38x = 513. Then we divide out the 38 and that leaves us with x = 13.5.
17) In this 5 sided polygon, the angle measures are 139, 5x, 92, 71, and 9x. Like number 16, we add these up to get a sum of 14x + 302 = 540. We subtract out the 302, leaving us with the equation 14x = 238. Finally, we divide out the 14 to get x = 17.
I hope the numbers are right since the values are a bit blurry! If not, just use the same work process to get your answer :)
Answer:
f=127 cm
Step-by-step explanation:
Law of Cosine:
x squared=92 squared+42 squared-2(92)(42)(cos 141)
x squared =8464+1764-7728(cos 141)
x=127 cm
Answer:
x=26
Step-by-step explanation:
let take the 3rd angle of the triangle y
2x + 76 + y = 180 ( angle sum property)
y = 180 ‐ 76 ‐ 2x
y = 104 ‐ 2x
5x ‐ 2 + y = 180 ( linear pair)
5x‐2+104‐2x = 180 ( y = 104 ‐ 2x)
3x+102=180
3x=180‐102
x=78/3
x=26
hope this ans will help u
Answer:
c
Step-by-step explanation: