Write an expression that gives the requested sum.

The sum of the first 16 terms of the geometric sequence with first term 9 and common ratio 2

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.

Can someone me with my math problem pls my teacher is on my back about this

Atriangle has side lengths of x, x+11, and 3x+5. what is the perimeter?