In triangle ABC, AD and BE are the angle bisectors of angle A and angle B and De is parallel to AB. Find the length of DE if perimeter of ABDE is 30 cm and AB=12cm

If 1 is divided by the sum of y& 4.the result is equal to 3 divided by 4, find the value of m

Give the equations of two different lines that are perpendicular to the line 3x + 4y = 7.

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.