SOLUTION: Jack goes to the gym each week. Every week he lifts 8 pounds more than the previous week. During the ninth week he lifts 250 pounds. How much was he lifting during his 1st week?
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Question 905480: Jack goes to the gym each week. Every week he lifts 8 pounds more than the previous week. During the ninth week he lifts 250 pounds. How much was he lifting during his 1st week?
Answer by ewatrrr(24785) (Show Source): You can put this solution on YOUR website!
sn = a1 + (n-1)d, d = 8
s9 = a1 + 8*8 = 250, a1 = 186
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