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August 22nd, 2018, 10:52 PM  #1 
Member Joined: Aug 2018 From: Nigeria Posts: 73 Thanks: 2  Arithmetic sequence
I need a profession ready to teach and make you understand to solve this. Mr Smith starts a job with an annual salary of \$6400 which increases by \$240 every year. After working for 8 years, Mr Smith is promoted to a new post with an annual salary of \$9500 which increases by \$360 every year. Calculate 1. Mr Smith's salary in the fifteenth year of service 2. Mr Smith's total earnings at the end of fifteenth year of service HELP ME OUT...I'M CONFUSED Last edited by skipjack; August 28th, 2018 at 11:30 PM. 
August 23rd, 2018, 09:12 AM  #2  
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 13,949 Thanks: 987  Quote:
Code: First 8 years : Last 7 years 1 2 7 8 9 10 14 15 6400 6640 ... 7840 8080 9500 9860 .... 11300 11660 Were you instructed to use the "sum of arithmetic series" formula? Last edited by skipjack; August 28th, 2018 at 11:30 PM.  

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