The table shows the results of four surveys that randomly sampled 30 teenagers about their favorite night to hang out with frien
ds. Friday Saturday Sunday Total Survey 1 9 14 7 30 Survey 2 11 13 6 30 Survey 3 10 14 6 30 Survey 4 7 5 18 30 Identify surveys that are likely biased. Based on the unbiased surveys, what percent of the teenagers are likely to prefer hanging out with their friends on Saturday night? 21 % 34 % 38 % 46 %
2 answers:
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Answer: Second option, third option and fifth option.
Step-by-step explanation:
In order to solve this exercise it is important to remember the multiplication of signs:
Knowing that, you can distribute the sign and add the like terms. Repeat this procedure in each expression given in the exercise.
Therefore, you get:
You can identify that the expressions ,
and
are equivalent after simplifying.