Mathematics

10 March, 17:35

Emily is three years older than twice her sister Mary's age. The sum of their ages is less than 30.

Let x represent Mary's age.

Which inequality represents Mary's possible age?

A. 0 < x < / = 9

B. 0 < x < / = 18

C. 0 < x < 18

D. 0 < x < 9

+4

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