Mary practiced violin for 2 hours and her brother practiced trombone t times as long or 8 hours. write and solve an equation to find how many times as long mary's brother practiced trombone

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.

Which compound inequality could be represented by the graph?

Can someone me out here number 4 plz