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Finding the sum

Questions (3)

Find the sum given for each of the following series:(a) Sn=1+5+9+....(n=15)(b) Sn=(-8)+(-3)+2+... (n=20)
1. 4 answers
2. asked by Alexis
3. 205 views
1. The total of 36, 78, 198, 475, and 620 isA. 2,109. B. 1,731. C. 1,187. D. 1,407. I say it's D 1407
1. 2 answers
2. asked by Jenna
3. 1,238 views
A charity raised $25,663 during a fundraising dinner and $23,517 during a concert. How much did the charity raise overall?
1. 1 answer
2. asked anonymously
3. 41 views