7.RP.2c
Represent proportional relationships by equations. For example, if total cost t is proportional to the number n of items purchased at a constant price p, the relationship between the total cost and the number of items can be expressed as t=pm.
Example Problems
A car travels 540 miles in 9 hours.
How many miles does the car travel per hour?
How many miles does the car travel per hour?
There are 320 ounces in 20 pounds.
How many ounces per pound are there?
How many ounces per pound are there?
We can calculate x, the amount of kilometers run in t hours, using the equation .
How many kilometers are run per hour?
How many kilometers are run per hour?
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