SOLUTION: Ted and Charlene sold cookies. After 5 days, they had sales totaling $40.00. Each day, their sales were $0.25 higher than on the previous day. What were the sales on the first day?

Algebra ->  Finance -> SOLUTION: Ted and Charlene sold cookies. After 5 days, they had sales totaling $40.00. Each day, their sales were $0.25 higher than on the previous day. What were the sales on the first day?      Log On


   

Question 1029325: Ted and Charlene sold cookies. After 5 days, they had sales totaling $40.00. Each day, their sales were $0.25 higher than on the previous day. What were the sales on the first day?
Answer by josmiceli(19441) About Me  (Show Source):
You can put this solution on YOUR website!
Let +s+ = the sales on the 1st day
2nd day:
+s+%2B+.25+
3rd day:
+s+%2B+2%2A.25+
4th day:
+s+%2B+3%2A.25+
5th day:
+s+%2B+4%2A.25+
---------------
The sum is:
+5s+%2B+10%2A.25+=+40+
+5s+=+40+-+2.5+
+5s+=+37.5+
+s+=+7.5+
the sales on the 1st day were $7.50
check:
7.50
7.75
8.00
8.25
8.50
------
40.00 total