Answer:
9. C
10. C
11. C
Step-by-step explanation:
9.
simply, [tex]\frac{4}{5} >\frac{2}{3}[/tex]
10.
the greatest divisor of 28 is 7, so:
28 + 7 = 35
11.
the greatest divisor of 15 is 5, so:
15 + 5 = 20
n = 20
the greatest divisor of 20 is 10, so:
20 + 10 = 30
