The volume of this rectangular prism is 8.1 cubic millimeters what is the value of Z ​

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.

Can someone me out here and the tell me the greatest common factor

y=2x−1 5x−4y=1 is (1,1)(1,1) a solution of the system?