(6 + 8x)8 help pls don’t kno the answer
2 answers:
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Answer:
The amount of peanuts to use is 5 pounds and that of cashews is 30 pounds.
Step-by-step explanation:
Let the amount of peanut to use to be x
Let the amount of cashews to use to be 35-x
Form equations to compare amounts for individual foods and the mixture
So the pounds to be used for peanuts is 5 pounds
The pounds to be used for cashews will be 35-x= 35-5=30 pounds
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Answer:
The top 20% of the students will score at least 2.1 points above the mean.
Step-by-step explanation:
When the distribution is normal, we use 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.
The mean of a certain test is 14 and the standard deviation is 2.5.
This means that
The top 20% of the students will score how many points above the mean
Their score is the 100 - 20 = 80th percentile, which is X when Z has a pvalue of 0.8. So X when Z = 0.84.
Their score is:
16.1 - 14 = 2.1
The top 20% of the students will score at least 2.1 points above the mean.