jaylynomalley
05.12.2019 •
Mathematics
{exercise 8.41 (algorithmic)} america's young people are heavy internet users; 87% of americans ages 12 to 17 are internet users (the cincinnati enquirer, february 7, 2006). myspace was voted the most popular website by 9% in a sample survey of internet users in this age group. suppose 1,450 youths participated in the survey. what is the margin of error, and what is the interval estimate of the population proportion for which myspace is the most popular website? use a 95% confidence level and round your answers to 3 decimals. for interval estimate enter your answer using parentheses and a comma, in the form (n1,n2). do not use commas in your numerical answer (i.e. use 1200 instead of 1,200, etc.)
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Ответ:
Ответ:
ANSWER:
x=2STEP:
Multiply the parenthesis by the number before.
28-4x=5x+10
Add 4x to both sides.
28-4x=5x+10
28=9x+10
Subtract 10 from both sides.
18=9x
Divide both sides by 9.
2=x