Step-by-step explanation:
A real number MUST be able to be represented on a number line.
All numbers can be placed on a number line including irrational numbers.
Numbers like π can be placed between 3.13 and 3.15. It is a number.
Numbers like x or ∑ isn't a "REAL" number because it has no value.
Answer: y = 1 +/- 
<u>Step-by-step explanation:</u>
y² - 2y + 1 = x + 5
(y - 1)² = x + 5

y - 1 = +/- 
y = 1 +/- 
Answer:
x=-1 y=1/2
Step-by-step explanation:
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