For a summer job, lucy is in charge of chickens and sheep. there are 16 animals total. the number of chickens, y, is 4 less than the number of sheep, x. which ordered pair (x, y) represents the number of chickens and sheep? (4, 12) (6, 10) (8, 8) (10, 6)

What is the number 321,000,000 in scientific notation? also what is the number? ?

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.

The vertex of this parabola is at (-2,-3). when the x-value is -1, the y-value is -5. what is the coefficient of the squared expression in the parabola's equation?