Simplify: 6-a(4-a)-2a

a^2 - 6a + 6

Step-by-step explanation:

6−a(4−a)−2a =

6+a2+−4a+−2a

6+a2+−4a+−2a

(a^2)+(−4a+−2a)+(6)

a2+−6a+6

=a^2−6a+6

50-38=12

step-by-step explanation:

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.