In Exercises 1-6, tell whether the ordered pair is a solution of the system of linear equations.
1. (3,1); x + y = 4
2. (1,3); x - y = -2
3. (2,0); y = x - 2
2x - y = 3
2x + y = 5
y = -3x + 6

36 inches/second = yards/minute how many yards?

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 volume of gas a balloon can hold varies directly as the cube of its radius. imagine a balloon with a radius of 3 inches can hold 81 cubic inches of gas. how many cubic inches of gas must be released to reduce the radius down to 2 inches?