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MF.PR.7 Challenge MF-021-A13-V04

Solve proportion equations and explain why the setup matches the context.

Choose a smart way to solve a proportion

Problem

A map scale is \(3~\text{inches}~\text{to}~18~\text{miles}\). Consider these methods for finding the map distance for \(27~\text{miles}\): A, unit rate in miles per inch; B, reverse unit rate; C, incorrect scaling; D, incorrect cross-products. Choose the miles-per-inch method, then calculate the map distance.

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Four variants of this problem type
Curriculum context
Standard
MF.PR.7
Category
Proportional Reasoning
Domain
Equations
Objective
Solve proportion equations and explain why the setup matches the context.
Problem type
Choose a smart way to solve a proportion