Astudent is given the problem: x^3+7x+9=0 . which of the following statements is false?

a.
completing the square cannot be used to solve the given equation.
b.
completing the square can only be used to solve a quadratic equation.
c.
completing the square can be used to solve the given equation.
d.
completing the square cannot be used because of the x^3

In a study of the relationship between socio-economic class and unethical behavior, 129 university of california undergraduates at berkeley were asked to identify themselves as having low or high social-class by comparing themselves to others with the most (least) money, most (least) education, and most (least) respected jobs. they were also presented with a jar of individually wrapped candies and informed that the candies were for children in a nearby laboratory, but that they could take some if they wanted. after completing some unrelated tasks, participants reported the number of candies they had taken. it was found that those who were identiď¬ed as upper-class took more candy than others. in this study, identify: (a) the cases, (b) the variables and their types, (c) the main research question, (d) identify the population of interest and the sample in this study, and (e) comment on whether or not the results of the study can be generalized to the population, and if the ď¬ndings of the study can be used to establish causal relationships.

D. in a discrete probability distribution, the sum of the probabilities for the discrete variables will be > 1. true or false

Find the value of the variable and the length of each chord for #5 and #6.