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8-75.

Mr. Wright was making a table to figure out how much it costs to send a certain number of regular letters through the mail. Use proportional reasoning to complete his table at right.  

Number of Letters

Cost of Stamps ($)

First set up the proportion.

What did you multiply by to get ?

Multiply by to get the number of letters. Repeat this strategy for all of the blanks within the table.

letters for