Three friends went to the movies. Each purchased a medium-sized popcorn for dollars and a small soft drink for
dollars.
a. Write the expression that represents the total amount of money (in dollars) the three friends spent at the
concession stand.
b. If the concession stand charges $. for a medium-sized popcorn and $. for a small soft drink, how much did the three friends spend on their refreshments altogether?

step-by-step explanation:

i have done this all on a piece of paper but idk how to put it on here cuz it needs to be drawn

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.

parallelogram is the   answer