Since perimeter means adding all 4 sides, you divide 86 divided by 4 equals = 21.5. Then do 21.5 + 21.5 which equals 43. And 43 + 43 = 86. So two sides are 21.5, and the other two sides are 43. So 21.5 < 43. 21.5 is the shortest sides. Hope this Helps!
Multiply the z-score by the standard deviation:
2 x -1.5 = -3
Now add that to the mean:
49 + -3 = 46 inches.
I hope that this helps you.
Answer:
The answer to your question is x ≠ -10 x ≠ 2 x ≠ -2
Solution 
Step-by-step explanation:
Process
1.- Factor all the polynomials
= 
2.- Invert the second term
= 
3.- Simplify
=
4.- x must be different to
x ≠ -10 x ≠ 2 x ≠ -2
This values are from the factor expressions and then equal to zero.
Total weight of the 8 backpacks = 8 x 14 = 112 pounds
Total weight of the 12 backpacks = 12 x 9 = 108 pounds
Total weight of all the 20 backpacks = 220 pounds
Mean weight of the 20 backpacks = 220 ÷ 20 = 11 pounds
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Answer: The mean weight of the 20 backpacks is 11 pounds
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