What is the domain of the function shown in the mapping? A. {x | x = –5, –3, 1, 2, 6}
B. {y | y = –9, –6, 0, 2, 4}
C. {x | x = –9, –6, –5, –3, 0, 1, 2, 4, 6}
D. {y | y = –9, –6, –5, –3, 0, 1, 2, 4, 6}

Step-by-step explanation:

The mapping between sets is shown in the image attached.

Remember that the Input Set represents the domain, the x-values. The Output Set represents the range, the y-values.

So, basically we need to choose the set of x-values which has the same elements than the Input Set showed in the image.

Therefore, the right answer is A, because it has the same elements than the Input Set shown.

option (b) is correct

step-by-step explanation:

to find the solution of this system, we need to convert it into reduced row-echelon form. we have,

after applying row operations r2 -> r2/2 and r3 -> r3/3, we get,

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.