
Mark M. answered 01/15/15
Tutor
5.0
(278)
Mathematics Teacher - NCLB Highly Qualified
Use a proportion
14.5 / 21 = x / 18
(18)(14.5) / 21 = x
261 / 21= x
12.4285714 ≈ x
Christopher K.
asked 01/15/15Mark M. answered 01/15/15
Mathematics Teacher - NCLB Highly Qualified
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