9. What is the common factor of the expression 4c / 16c?
A 50
B. 4c
C. 30
D.2c

10. What is the simplest form of the expression x²y/xy?
A. 1/x
B. X
C. 1/x2
D. X2

11. The expression 75xy⁴ / 25xy³ can be simplified as
А. 5у
B. y/3
C. Зу
D. 15y15

12. Simplify the expression x-²y⁵/x-⁶y-¹
A. X⁴y²
B. x⁴y⁶
C. X⁶y⁴
D. x2y4

13. Reduce the fraction to lowest term: 18xw / 27x²
A. 2w / 3x
B. 6x/9w
C. 3x/9w
D. 18w 127x

14. The expression 7y4/21yº can be simplified as
A. 5y
B. y/3
C. 3y
D. 15y/5

15. Simplify the expression x⁶y⁵/x⁴ý
A. x⁴y²
B. x⁴y⁶
C. X⁶y⁴
D. x²y⁴​