Answer:
1, -1, -3
Step-by-step explanation:
6(x+x+2+x+4)=-18
6(3x+6)=-18
18x+36=-18
18x=-54
x=-3
so x=-3, x+2=-1, and x+4=1
Answer:
The correct option is b.
Step-by-step explanation:
The formula for standard deviation is

where,
is mean of the data and n is number of observation.
The variance of a stock's returns can be calculated by the above formula.
Variance of stock's returns is the average value of squared deviations from the mean.
Therefore the correct option is b.
Answer= y=-_
Step-by-step explanation:
y= -2+4x