0
Anonymous
17
Betty Tromp ∙
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13, because -2+15=13.
Wiki User
a + 2
15 more than -3 = 12
4 more than 15 is 4 + 15 = 19.
It is composite because it has more than 2 factors
15 + 2/3 n = 30n = 3/2 x (30 - 15) = 22.5 or 221/2