Answer:
12 a x^ 2 -15 a b-16 a
Step-by-step explanation:
1/4
there are 12 gumballs in total
1 yellow + 2 pink = 3 gumballs out of all 12
3 /12 is simplified to 1/4 as both numbers is divisible by 3
1)HGI ,S.S.S
2)DEF,A.S.A
3)C.E.D,S.A.S