Suppose there are 12 students, among whom are three students, M, E, P (a Math Major, an Engineering Major, and a Physics Major respectively). We
want to send a delegation of four students (chosen from the 12 students) to a
convention. How many ways can this be done so that the delegation includes
exactly two (not more, not less) students from M, E, P?

d

step-by-step explanation:

d

idk what the heck he answer is, i’m just putting this here so i finish my account

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.