Answer: observational study
Step-by-step explanation:
Observational study : A study in which an observer analyse one or more characteristics of a population (depends on the objective of the study) by just observing the individuals in a sample of the population, but he / she never influence the variables of interest.
Design experiment : In this experimenter design an experiment with a series of tests to check the change in the dependent variable. Here , the experimenter influences the variables of interest.
Given : A poll is conducted in which 574 high school students are asked about how often they listened to music during the past week.
here , the poll is just observing the interest of students instead of influencing them.
Hence, the study depicts an observational study.
Answer:
If they are both red, 7/22
If both blue, 1/22
Yellow, 1/66
Step-by-step explanation:
7/12 times 6/11 (both decrease by one because there is no replacement)
3/12 times 2/11
2/12 times 1/11
The characteristic polynomial is given by 
:
Compute the determinant by Laplace expansion along the first row:
Answer:
10 yards
Step-by-step explanation:
1 yard is 36 inches. Divide 360 by 36 and you get your answer of 10 yards.
Hello,
Answer: m = 2
Step-by-step explanation:
m - 2 = 2 - m
⇔ m - 2 + m = 2 - m + m
⇔ 2m - 2 = 2
⇔ 2m - 2 + 2 = 2 + 2
⇔ 2m = 4
⇔ 2m/2 = 4/2
⇔ m = 2
