The answer is 256 to 7 x 28=(20+ )=40+=
AC is perpendicular to BD
so
3x + 9 = 90
3x = 81
x = 27
answer
x = 27
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in case if you need to find y
2x + y = 90
2(27) + y = 90
54 + y = 90
y = 90 - 54
y = 36
Answer:
Average or Median is the best measurement because Median would show the in between of his high's and low's but average shows, well, average
Since the standard deviation is not given, we assume the process is a Poisson process, with mean 12000 miles.
From Poisson distribution tables, we see that with a value of lambda(mean)=12000, the lower tail probability for x=12140 miles is 0.9000105, which means that the 90 percentile is 12140 miles.
The lower-tail probability of 9000 miles is 6.2*10^(-181) which is essentially zero.
NOTE: if the problem were modelled with a normal distribution, the probabilities would be completely different.
To find the mean of a set of numbers you simply add all the numbers then divide by how many numbers you added
113+185+140+219+295 = 952
952/5 = 190.4 (if you need it rounded, just put 190)