What is the sum of 4 - 7i and the conjugate of 2 + 3i ? A.6 - 4i
B.8 - 21i
C.8 - 4i
D.6 - 10i

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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.

9/10 divide by -3/15 as a mixed number