3 years ago

A square field has an area 121 square meters.What is the perimeter of the field?

2 answers:

5 0

Are is equal to the length times width so what times what would give you 121 and that's how you get the answer to that problem or any area perimeter problem

irinina [24]3 years ago

3 0

Keep in mind: area of a square = (side length)^2
perimeter of a square = 4(side length)

Use the first formula to determine the side length (find the sq. rt. of 121 m^2).
Then use the second formula to find the perimeter (in meters).

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What is the slope of the line that contains the points (-1,9) and (5,21)

geniusboy [140]

Y-y
——-
X-x

21-9=12
5-(-1) =6
So the answer is D

7 0

3 years ago

Given the data shown below, which of the following is the best approximation of the coefficient of determination (r^2)

HACTEHA [7]

The coefficient of determination can be found using the following formula:

$r^2=\mleft(\frac{n(\sum ^{}_{}xy)-(\sum ^{}_{}x)(\sum ^{}_{}y)}{\sqrt[]{(n\sum ^{}_{}x^2-(\sum ^{}_{}x)^2)(n\sum ^{}_{}y^2-(\sum ^{}_{}y)^2}^{}}\mright)^2$

Using a Statistics calculator or an online tool to work with the data we were given, we get

So the best aproximation of r² is 0.861