Amath teacher gave her class two tests. 76% of the class passed the first test. 58% of the class passed both tests. what is the approximate probability that a student who passed the second test, given that he passed the first test.

17. a researcher measures three variables, x, y, and z for each individual in a sample of n = 20. the pearson correlations for this sample are rxy = 0.6, rxz = 0.4, and ryz = 0.7. a. find the partial correlation between x and y, holding z constant. b. find the partial correlation between x and z, holding y constant. (hint: simply switch the labels for the variables y and z to correspond with the labels in the equation.) gravetter, frederick j. statistics for the behavioral sciences (p. 526). cengage learning. kindle edition.

Solve each quadratic equation by factoring and using the zero product property. n^2 - 49 = 0

If the value of cos330°is√3/2 then find cos 165°.