Ummm i don't know what the pmf would be but the probability of grabbing a blue sock would be 10 out of 100...
In an equation using x is just a place holder because those numbers are variables so it doesn't matter whether it is x or w.
Answer:

Step-by-step explanation:
well, by using definition of tan of an angle
let the distance between Earth and shooting star is
.
since
,
then 
Answer:
Only line A is a well-placed line of best fit.
Step-by-step explanation:
I did this on Plato and got it correct.
15% of the number 60 is 9