In the given triangle ABC, angle A is 90 degrees and segment AD is perpendicular to segment BC. If DB = 27 and DC = 3, find the length of AD. Show your work. AD = ?

5x + 2 = 12 solve the following equation. then place the correct number in the box provided.

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.

Is the square root of 4 plus the square root of 16 rational?