Answer:
18: x=98 y=38
19: x=20 y=50
Step-by-step explanation:
To figure out figure 18 you would first figure out x and a triangle equals 180 so 180- (36+46) which is 180-82= 98 and then there are vertical angles between the right and left side so x is equal to one of the angles on the right so 98+44= 142 and 180-142= 38
Then to figure out figure 19 you would first find y by adding 39 and 91 to get 130 and 180-130=50 and then 180-91 (for the angle in the bottom right for the left triangle) is 89 so 89+71=160 and 180-160 is 20.
Answer:
5.6
Step-by-step explanation:
The point of interest divides LM into segments of the ratio 3 : 2. The point has coordinates that are the weighted average of the coordinates of L and M with the weights being the reverse of the ratio numbers.
(2L + 3M)/5 = (2·2 +3·8)/5 = 28/5 = 5.6 . . . . y-coordinate only
Answer:
try one try one try one try one
Answer:
Step-by-step explanation:
[(30+6)-32] ÷ 9*2
[36-32] ÷ 18
4÷18
2÷9
0.222222
Answer:
μ = 16.31
σ² = 11.22
σ = 3.35
Step-by-step explanation:
The mean is the sum of the midpoints times the percentage.
μ = ∑ (mx)
The variance is the sum of the squared differences between the midpoints and the mean, all divided by the total number of people minus one.
σ² = ∑ (m − μ)² / (n − 1)
And the standard deviation is the square root of the variance.
First, we calculate the mean.
Now, we find the variance.
The standard deviation is therefore σ = 3.35.