Write the equation for a line that passes through the point (-8,2) and is parallel to 5x-4y=4. Enter your equation in slope inte
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An equilateral triangle has 3 sides of equal length
find the length of 1 side and that is the length of te other 2 sides
so find the length and times 3
we need to find the distance betwen the points (-8,-5) and (3,7)
distance between the points (x1,y1) and (x2,y2) is
so
distance between (-8,-5) and (3,7) is
the distance is √265
the perimiter is 3√265 units
find the length of 1 side and that is the length of te other 2 sides
so find the length and times 3
we need to find the distance betwen the points (-8,-5) and (3,7)
distance between the points (x1,y1) and (x2,y2) is
so
distance between (-8,-5) and (3,7) is
the distance is √265
the perimiter is 3√265 units
Answer:
The standard deviation is 7.7
Step-by-step explanation:
Problems of normally distributed samples can be 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:
8 percent of the scores are above 89
This means that X = 89 has a pvalue of 1 - 0.08 = 0.92. So when Z = 89, Z = 1.405.
The standard deviation is 7.7