Answer:
4 packs of invitations and 2 packs of napkins.
Step-by-step explanation:
Answer:
1. 1340
2. Variance = 47200, standard deviation = 217.25556
Step-by-step explanation:
1-
If X is the random variable that give the number of admissions, then the expected number of admissions<em> E[X]</em> for the fall semester is
1080*P(X=1080)+1380*P(X=1380)+1540*P(X=1540) =
1080*0.4+1380*0.1+1540*0.5 = 1340
2-
The <em>variance</em> is defined as
We have
whereas
So the variance equals
The <em>standard deviation is just the square root of the variance</em>, so, the standard deviation is

Answer:
x=129 degrees
Step-by-step explanation:
Answer:
inverse of
is 
Step-by-step explanation:
To find the inverse of given function, we replace
by y

interchanging x and y we get

then separating the variable y we get

again replace y by
, we get

and we complete the question·
Answer:
y= -2
y=-2
Step-by-step explanation: