arithmetic sequences maze

an = a1 + (n - 1)d a5 = 15.5 + (5-1)d 27.1 = 15.5 + 4d 11.6 = 4d 2.9 = d a16 = 15.5 + (16 - 1)2.9 a16 = 15.5 + 15(2.9) a16 = 15.5 + 43.5 a16 = 59

Given: a1=15.5 and a5=27.1 Find: a16

Carol H. answered • 02/16/18

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a_n = a₁ + (n - 1)d

a₅ = 15.5 + (5-1)d

27.1 = 15.5 + 4d

11.6 = 4d

2.9 = d

a₁₆ = 15.5 + (16 - 1)2.9

a₁₆ = 15.5 + 15(2.9)

a₁₆ = 15.5 + 43.5

a₁₆ = 59

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