Answer:
A = 60°
Step-by-step explanation:
First to find the missing angle you add the three known angles,
90 + 135 + 75 = 300
Then, you subtract, 360 - 300 = 60
<h3>So, 360° = 60° + 90° + 135° + 75°</h3><h3 />
To get the function form, the y must be the only variable on one side. So, we need to solve for it.
We have:
-x + y = 6
then we get
y = 6 + x
when we move the x to the other side to get y by itself.
If you have any questions then leave a comment. Good luck!
Answer: The mean number of checks written per day 
Standard deviation
Variance 
Step-by-step explanation:
Given : The total number of checks wrote by person in a year = 126
Assume that the year is not a leap year.
Then 1 year = 365 days
Let the random variable x represent the number of checks he wrote in one day.
Then , the mean number of checks wrote by person each days id=s given by :-

Since , the distribution is Poisson distribution , then the variance must equal to the mean value i.e. 
Standard deviation : 
Angle 4 = Angle 5 = 42⁰( alternate interrior angle)
Hope it helps u