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3 years ago

7

PLZ HELP ASAP IM ON THE TEST NOW Which sample is biased?

2 answers:

RoseWind [281]3 years ago

6 0

A. Interviews of random teens at a rock concert

These teens are all fans of the same music because they are attending the same concert. They cannot accurately represent all teens music choices because they are all bias toward the same music style. They are especially excited about it at the concert so responded are even more skewed.

Sophie [7]3 years ago

3 0

I think (a) because they interviewed people who were already at a rock concert about what musician they enjoy the most

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If you multiply (2x+1)(x-5) what’s the answer

photoshop1234 [79]

Answer:

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Step-by-step explanation:

(2x+1)(x-5)

Using FOIL

= 2x^2 - 10x + x - 5

= 2x^2 - 9x - 5

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2 years ago

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2 years ago

7. The new York Volleyball Association

Yuri [45]

Using a geometric sequence, it is found that after 3 rounds, 8 teams are left.

In a geometric series, the quotient between consecutive terms is always the same, and it is called common ratio q.

The general equation of a geometric series is given by:

$a_n = a_1q^{n-1}$

In which $a_1$ is the first term.

In this problem:

64 teams were invited, thus $a_1 = 64$ .
After each round, half the teams are eliminated, thus $q = \frac{1}{2}$ .

The <u>number of teams after 3 rounds</u> is the 4th term of sequence, as the first is the initial number(0 rounds), thus:

$a_n = a_1q^{n-1}$

$a_4 = 64\left(\frac{1}{2}\right)^{4-1}$

$a_4 = 8$

After 3 rounds, 8 teams are left.

A similar problem is given at brainly.com/question/25317689

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2 years ago