Answer:
3x + 5y= 9 is the answer ...
<span>12X = -36
Divide 12 on both sides
Final Answer: X=-3</span>
A) mean = np
0.6(200) = 120
SD^2= np(1-p)
SD = sqrt(200(0.6)(1-0.6))
SD = 6.928
B) the mean of binomial distribution in this case is the average number of samples you’ll have to take before you achieve a sample of 200 where 60% of smokers who started smoking before 18.
The answer should be 5.5 because you have to divide it. The fraction would be 5 over 10
Check the picture below
notice, using the 30-60-90 rule, since that triangle is a 30-60-90 triangle, we get 11 = 2x