Answer:
Third one: 2(2a-3b+c)+c
Step-by-step explanation:
Hope this helped:)
Congruent angles of what... be more specific please..
Let the angles be 4x , 5x
4x + 5x = 180 { supplementary}
9x = 180
x = 180/9
x = 20
Larger angle= 5x = 5* 20 = 100