
Mark M. answered 11/20/18
Mathematics Teacher - NCLB Highly Qualified
15 : 9 :: x : 21 proportion
9x = (15)(21) product means/extremes
Can you solve for x and answer?
Lex B.
asked 11/20/18The distance that a spring will stretch varies directly as the force applied to the spring. A force of 15 pounds is needed to stretch the spring 9 inches. what force is required to stretch the spring 21 inches?
Mark M. answered 11/20/18
Mathematics Teacher - NCLB Highly Qualified
15 : 9 :: x : 21 proportion
9x = (15)(21) product means/extremes
Can you solve for x and answer?
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