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?

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) (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

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