The height of an ostrich is 20 inches more than 4 times the height of a kiwi .if an ostrich is 108 inches rall,how tall is a kiw
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Let = -9,
= -12 and so on.
-15 = -9 + (-6)
-15 = -9 + 2(-3)
Let -3 be the common difference, or <em>d</em>.
= -9 + n(-3)
= -9 - 3n