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18. What is the simplest form of (4ab2)3?
A. 12 aºb
B. 12 a b
C. 64a6b5
D. 64aº86
19. Which equation represent the area of the square if a side is represented by a -97
A. a?- 18a-81 B. a? +18a -81 C. a2 18a +81 D. a2 + 18a + 81
20. Mrs. Martin can run 10kph. How far can she run in (x+3) hours?
A. (10x + x) km B. (x + 30) km C. (10% + 3) km D. (10x + 30)km
21. Which of the following expressions represents the square of the sum of x and y?
A. (x + y )
B. (x-y)
C.(x/y)
D. (xy )​