Back to Use variables to represent numbers and write expressions — Problem 2 · Task Set 33

6.EE.B.6 Tutor Intake -- Variables and Expression Writing

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Grade 6·9 problems·~10 min·Common Core Math - Grade 6·standard·6-ee-b-6

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Concepts

A parking garage charges $\text{\char"0024}2$ per hour. Write an expression for
the total cost of parking for $h$ hours, where $h$ could be any
amount of time a customer parks. Is $h$ here an unknown number or
a ranging number?

Ranging — $h$ represents any number of hours a customer might park, not one specific value.

Unknown — $h$ stands for exactly one specific number of hours that we need to solve for.

Ranging — but only because the cost per hour, $2, changes.

Unknown — because every customer parks a different, definite number of hours.