PSYCHOLOGY A researcher wants to compare math performance scores of high school juniors who are located in various urban areas. The researcher will most likely conduct the research by using which descriptive research method?
A. naturalistic observation
B. longitudinal study
C. cross-sectional study
D. case study

the answer was wrong so you should have checked with your pals first

if triangle abc is congruent to triangle def, their interior angles are congruent, because congruent parts of congruent triangles are congruent (cpctc).

that means ∠d is congruent to ∠a; ∠d is equal to 8x - 2.

interior angles of all triangles add to equal 180 degrees, so you can set the sum of these interior angle values equal to 180 and solve for x.

180 = (8x - 2) + 22 + 72

180 = 8x - 2 + 22 + 72

180 = 8x + 92

88 = 8x

11 = x

x = 11