Which trinomial is equivalent to 3(x-2)^2 - 2(x-1)
1 answer:
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Answer:
Step-by-step explanation:
Let
x ----> the number
we know that
The phrase " the phrase: the difference of a number and 9" is equal to
subtract the number 9 from the number x
(x-9)
The phrase" no more than 95" means "less than or equal to 95" (≤95)
so
The inequality that represent this situation is
Answer:
Weights of at least 340.1 are in the highest 20%.
Step-by-step explanation:
Problems of normally distributed samples are solved using the z-score formula.
In a set with mean and standard deviation
, the zscore of a measure X is given by:
The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.
In this problem, we have that:
a. Highest 20 percent
At least X
100-20 = 80
So X is the 80th percentile, which is X when Z has a pvalue of 0.8. So X when Z = 0.842.
Weights of at least 340.1 are in the highest 20%.