Kent worked in the houseware section of a department store. this year he set a record high for vacuum sales with567 vacuum sold. the previous yearhigh was set last year, when 540 vacuums were sold. what is the percent of increase in sales from last year to this year?

Multiply −2x(6x^4−7x^2+x−5) express the answer in standard form. enter your answer in the box.

What is the missing constant term in the perfect square that starts with x^2 -20x

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.