Answer:
The study is non-representative.
Step-by-step explanation:
Since a representative sample is a sample that contains participants from the general cross section of the society containing all the representative groups of the society.
In the given sample the sampling is only done in that section of the society that posses a telephone connection and it is not evident weather the participant voted or not thus we cannot categorize the sample as representative.
7 is the answer on the calculator you could use that
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Answer:
see explanation
Step-by-step explanation:
Given
(bx + a)(ax + b) = (ax² + b)b ← distribute parenthesis on both sides
abx² + a²x + b²x + ab = abx² + b² ( subtract abx² from both sides )
a²x + b²x + ab = b² ( subtract ab from both sides )
a²x + b²x = b² - ab ← factor out x from each term on the left side
x(a² + b²) = b² - ab ← divide both sides by (a² + b²)
x = 