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WI Forward Grade 7 Mathematics Practice Questions - Wisconsin Forward Exam Grade 7 Mathematics Exam

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Three quantities x, y, and z are related such that y is directly proportional to x with constant k1 = 2.5, and z is directly proportional to y with constant k2 = 1.6. What is the constant of proportionality relating z directly to x?
Correct Answer:
4.0

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