Ineed on this equation. i've seen someone post the formula on how to get the correct answer, but not the reasons behind why they used that particular method. if someone could me, it would be greatly appreciated. here's the problem:

at a movie rental machine, the movies rent for $3.00, except on tuesdays, when they rent for $0.49. approximately what percent of the regular cost is saved by renting a movie on a tuesday?

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.

1) what is the measure of the exterior angle, ∠uvw ? 2) in triangle man, what is the measure of the exterior angle at n (in degrees)?

At 6 1/2 cents per pound of string beans how much does 7 pounds cost