Hey hey i need some with percent change

Step-by-step explanation:

% Increase = Increase/Original value × 100 %

Data:

   Latest selling price = $20

-Original selling price = -  16

                    Increase = $  4

Calculations:

% increase = 4/20 × 100 % = 20 %

The percent increase is .

i think it is everything has to equal 180 so, if i correct 4=c. 6=d. 8=a. 7=b. and the last question would be c. because they are parallel lines and they are congruent.

step-by-step explanation:

the reason everything has to equal to 180 is because that is how it works. i'm guessing that is its rule. 4 and 8 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 6 and 7 are congruent and parallel so, that would be 30+30 because they have the same number. it would equal 60. 60+60 is 180. so, now you have your answer

the first one, all those points on the line just make a strait line.