A researcher wishes to compare how students at two different schools perform on a math test. He randomly selects 40 students form each of the schools and obtains their test scores. He pairs the first score from school A with the first score from school B, the second score from school A with the second score from school B and so on. He then performs a hypothesis test for matched pairs. a.) Is this approach valid? Why or why not
b.) If it is not a valid approach, how should the researcher have proceeded?

statement #3: proof- ang is congruent to ang ecd : angles are congruent.  

step-by-step explanation:

1: the missing angles in statement #3  

a.) acb  

reason- the reason why the answer is acb is because angle ecd and angle acb are both the same size *that's what the word congruent means this is really simple.  

2: the missing word in reason #3  

c.) vertical  

reason- the reason why the answer is vertical is because the angles in that diagram on figure 2 is slanted, which is vertical, and the e and a both lay on vertical lines. along with the other's, but e and a are the 2 main points you want to focus on. and c is kind of like your starting point, because c is for both angles, not just one.  

i hope that was and understanding.

the answer is -6

step-by-step explanation:

the answer is -6 because its next to the variable m