SOLUTION: If you make a deposit each week and end up with 50 dollars the 10th week and 62 dollars the 16th week how much are you depositing every week?

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Question 906299: If you make a deposit each week and end up with 50 dollars the 10th week and 62 dollars the 16th week how much are you depositing every week?
Answer by richwmiller(17219) About Me  (Show Source):
You can put this solution on YOUR website!
You are depositing 2 dollars a week
an = a + (n - 1)d
a10 = a + (9)d=50
a16 = a + (15)d=62
a + 15d=62
a + 9d=50
6d=12
d=2
a+18=50
a=32
d=2
32+9*2=50
32+30=62
1 32
2 34
3 36
4 38
5 40
6 42
7 44
8 46
9 48
10 50
11 52
12 54
13 56
14 58
15 60
16 62