Max wants to find our the exercise habits of local children. He plans to survey every third child he sees coming out of sporting goods store. Is this sample biased or unbiased?

Simplify.7x + 3y - 2 + 6x + 1 + y squared 2 you! ; )

Brian, chris, and damien took a math test that had 20 questions. the number of questions brian got right is 14 more than the number of questions chris got right. damien correctly answered 2 less than the number of questions chris answered correctly. if brian and damien have the same score, which statement is true?

Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?