Answer:
There are 2 answers to this question, both are correct.
Step-by-step explanation:
3 or 1.
That line that is made out of angles 1 and 2 is straight. What we know about straight lines is that they're 180°. This means that ∠1 and ∠2 are supplementary, adding up to 180°.
∠1 + ∠2 = 180
∠1 = (x + 81)
∠2 = (2x)
(x + 81) + 2x = 180
3x + 81 = 180
3x = 99
x = 33
The answer is x = 33.
Answer: 0.345
Step-by-step explanation:
Given : The incomes of families in Newport Harbor are normally distributed with Mean : and Standard deviation :
Samples size : n=4
Let x be the random variable that represents the incomes of families in Newport Harbor.
The z-statistic :-
For x= $800,000
By using the standard normal distribution table , we have
The probability that the average income of these 4 families exceeds $800,000 :-
Hence, the probability that the average income of these 4 families exceeds $800,000 =0.345