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Help 10 

NotSoSmart  Mar 8, 2018
 #1
avatar+87301 
+1

10.

 

She does 4 more each day than on the previous day....so.....

 

The number of sit-ups on the nth day can  be modeled by :

 

17   + 4 ( n - 1)

 

So...on Day 12, she does

 

17  + 4(12 - 1)    =

 

17 + 4*11  = 

 

17   + 44 =

 

61  sit-ups

 

 

cool cool cool

CPhill  Mar 8, 2018

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