Answer:
X = 63°
W = 60°
Y = 57°
Step-by-step explanation:
W = X - 3
Y = X - 6
X + W + Y = 180 substitute
X + (X - 3) + ( X - 6) = 3 X - 9 = 180
3X = 189
X = 63
W = 60
Y = 57
-3+7=4 should be your answer
Answer:
23
Step-by-step explanation:
Women total age = 5 x 23 = 115
Men total age = 3 x 24 = 72
The mean age of all the people
= (115+72)÷(8)
= 23.375
= 23 (nearest year)
Variance is the answer.
Explanation:
The variance is the average of the squared differences from the mean. To figure out the variance, first calculate the difference between each point and the mean; then, square and average the results.
