Three numbers, of which the third is equal to 36, form a geometric progression. If 36 is replaced with 20, then the three numbers form an arithmetic progression. Find the initial three numbers.

step-by-step explanation:

b. 153 students do not participate in sports and seventy-five 12th graders were surveyed

answer is c

step-by-step explanation:

81/12=324/x

x=48

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.