Which expression in equivalent to 48x-6+3y/3

Use the data on the dot plot to answer the question. how many people read for more than three hours last week? i'm on a unit test review

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.

Two numbers have a sum of -19. one number is x. what expression represents the other number?