Question

harold is collecting nike jordans. he currently has 23 pairs and plans to add 3 new pairs to his collection each month. at this rate, how many months will it take for harold to have 50 pairs of jordans? equation:

Answer 1

9 months

Explanation:

U₁ = 23

d = 3

Uₙ = 50

Uₙ = U₁ + (n - 1)d

50 = 23 + (n - 1)3

3(n - 1) = 50 - 23

n - 1 = 27 ÷ 3

n = 9 + 1

= 10

Harold will have 50 pairs of jordan at 10th month → it takes 9 months to have 50 pairs of jordan