Step-by-step explanation:
Z-score is calculated by the following formula:
Z = (X-mu)/sigma
where
X = data value
mu = mean
sigma = standard deviation
Given:
mu = 500
sigma = 100
X = 680
Z-score = (X-mu)/sigma = (680-500)/100 = 180/100 = 1.8
2x° and x° on the straight angle form a 180°
2x + x = 180
3x = 180
x = 60
The x is 60°
2x° and 2 y on the straight angle is 180°
since you know 2x is 120°
180 - 120 = 60
There is 2 y, so you divide 60 by 2
60 ÷ 2 = 30
The y is 30°
Answer:
D. AAA is not a congruence postulate
Step-by-step explanation: