Yes that is a function because every number has a pair that goes to each other once
Answers:
10. b. 
9. b. 
8. a. 
7. a. 
Step-by-step explanations:
10. Both segments are considered congruent, so turn both expressions into an equation:

Plug this back into the equation to get
on both sides.
9. All edges in a square obtain congruent right angles and edges, so set
equivalent to the given expression:

8. Both angles are considered supplementary, so turn both expressions into an equation and set it to one hundred eighty degrees:

7. In this rectangle, segment <em>EO</em><em> </em>is a segment bisectour, making these angles <em>Complementary</em><em> </em><em>Angles</em><em>.</em><em> </em>Therefore, set an equation up to find its complement:

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Answer:
C $1.75
Step-by-step explanation:
$469 divided by 268 is $1.75, so it's $1.75 per item
Should be Cubic meters or Cubic decimeters
Mass of the water in pool in Kilograms
Volume of water in pool in Liters
The approximation to estimate will be 0.2498