Hi there!
6(2) -2(4) +5
12-8+5
So D would be correct.
Answer: d. 15.49
Step-by-step explanation:
Given : The random variable K has a geometric distribution with mean 16.
Formula for Mean and standard deviation in geometric distribution:
(1)
(2), where p is the probability of success in each trial.
Since 
(Given)
Then from (1) ,
Put value of p in (2),
Hence, the standard deviation of random variable K is closest to 15.49.
Therefore , the correct answer is d. 15.49 .
Answer:
ACBD
Step-by-step explanation:
Increases, gains, earnings, upward motion are all represented by positive numbers. Decreases, losses, spending, downward motion are all represented by negative numbers. Here are the sums:
A: -33.57 +14.98 = -18.59
B: 7 2/5 -3/5 = 7 +(2/5 -3/5) = 7 -1/5 = 6 4/5
C: 3 1/6 +2 1/2 = (3+2) +(1/6 +3/6) = 5 4/6 = 5 2/3
D: 23.66 -15.84 = 7.82
__
Least to greatest, their order is ...
A (-18.59), C (5 2/3), B (6 4/5), D (7.82)
Since they both have 3x terms subtract the second from the first to get rid of the x terms...
3x+2y=10
-3x+y=-13
__________
3y=-3
y=-1, which makes 3x+2y=10 become: 3x-2=10 so
x=4
So the solution is the point (4, -1)
