Answer:
Domain is 0 to 50.
Step-by-step explanation:
80 - 30(first hour )=50
50-0(2nd hour)=50
50-20=30
30-20=10
10 Is THE ANSWER
100
they are vertical angles therefore, they have the same measure.
suppose 4:4:7 be 4x, 4x, 7x
or, 15x = 180°
or, X = 180/15
or, X = 12
therefore,
4x = 4x12= 48
4x= 4x12= 48
7x= 7x12= 84
so if you plus all of them you get 180
