Answer:
Given equation: 
when we complete the square , we take half of the value of 8 , then square it, and added to the left sides, we get;

∵8 is the value 
Notice that, we add this both sides so that it maintains the equality.
then;

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Simplify:

The number must be added to complete the square is, 
A dot plot shows results from a range of data, giving it coordiantes so you can plot it on a graph
False, vertical angles are not next to each other but opposite of each other
Answer: B
Step-by-step explanation: 7/8 * 3 = 2 5/8 :)