A real quadratic equation without real zeros always has two conjugate imaginary zeros. What does it mean for the two zeros to be conjugate? a) They have the form a±bi where a and b are real numbers.
b) They have the form ±a+bi where a and b are real numbers.
c) They have the form a±√b where a and b are real numbers (b not negative).
d) They have the form ±a+√b where a and b are real numbers (not negative).

6 cm

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.

6 adults and 9 children went.

a + c = 15

12a + 9c = 153

12(6) + 9(9) = 153

72 + 81 = 153