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Andrew earns an allowance of $14 the first week, $17 the next week, $20 the following week, and so on. How much will Andrew earn over the course of 10 weeks?

 
 Jan 11, 2019
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The final amount that he will  earn is     14 + 9(3) = 14 + 27 =   $41

 

So....the total amount that he earns =

 

[ First Week  Amt + Last Week Amt ] *  Number of Weeks / 2  =

 

[ 14 + 41 ] * 10 / 2  =

 

[ 55 ] * 5 

 

$ 275

 

 

cool cool cool

 
 Jan 11, 2019

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