2a because with 18a and 20ab they both have "a" in common and they are even thus multiples of 2 leaving you with 2a(9,10b)
He started with 3.
3 X 3 = 9.
9 - 5 = 4.
4 X 4 = 16.
16 - 7 = 9.
9 divided by 3 = 3.
3 + 6 = 9.
A. All people ❌
B.shops❌
C.control❌
D.shoes ✅✅✅✅✅✅
Answer its 5
Step-by-step explanation:
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