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soldier1979 [14.2K]
3 years ago
13

A variable has a mean of and a standard deviation of . observations of this variable have a mean of and a sample standard deviat

ion of . Determine the observed value of the
Mathematics
1 answer:
RideAnS [48]3 years ago
8 0

Answer:

the mean is 26

Step-by-step explanation:

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The length of a rectangle is 2 centimeters less than three times its width. Its area is 21 square centimeters. Find the dimensio
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Area = length x width

Area = 21 square cm

Width = x

Length = 3x + 2

21 = 3x+ 2 * x

21 = 3x ^2 + 2x

Subtract 21 from both sides:

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Use the quadratic formula to solve for x:

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4 0
3 years ago
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