3 years ago

Please helppppppppppppp

1 answer:

7 0

"He starts by sprinting 100 yards", so the first term is a_1 = 100

The common difference is d = 5 because he's adding 5 yards per day. The "21 days" info isn't going to be used at all

So because a_1 = 100 and d = 5, this means
a_n = a_1 + d*(n-1)
a_n = 100 + 5*(n-1)
a_n = 100 + (n-1)*5

Answer is choice D

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