PLEASE HELP NOW ASAP Which expression has the same sum as the one below? Negative 15 + 6 15 + 6 Negative 6 + (negative 15) 15 + (negative 6) 6 + (negative 15)

The parabola x= √y-9 opens: a.)up b.)down c.)right d.)left

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.

26) -2(7x) = (-2 • 7) x a. associative property of addition b. associative property of multiplication c. commutative property of multiplication d. commutative property of addition