Find the value of sec ø if cos ø=2/19;0°<ø<90°

One line passes through (-7,-4) and (5,4) . another line passes through the point (-4,6) and (6,-9)

The price of an item has been reduced by 30%. the original price was $30. what is the price of the item now ?

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.