Answer:
x>-9
Explanation:
move constant to the right
x+2>-7
calculate
x>-2-7
x>-9
the reason you flip the sign is because you multiplied with a negative number. always flip sign if the number you are either multiplying or dividing by is a negative. if it is positive then keep the sign the way it is.
Answer:
it would be the first one
Step-by-step explanation:
Answer:
(-2,4] and [7,α)
Step-by-step explanation:
the domain is open at -2 but closed at 4 and also closed at 7 but open till infinity..
Answer:
The distribution is 
Solution:
As per the question:
Total no. of riders = n
Now, suppose the
is the time between the departure of the rider i - 1 and i from the cable car.
where
= independent exponential random variable whose rate is 
The general form is given by:

(a) Now, the time distribution of the last rider is given as the sum total of the time of each rider:


Now, the sum of the exponential random variable with
with rate
is given by:

In mathematics it’s another term for isometry