Brandon received $4 from his uncle in the 1st week of school and $6 in the 2nd week. Each week, he receives $2 more than the week before.
- How much money did he received in the 15th week?
- In which week did he receive $18?
(a)
Amount that Brandon received on 1st Week = $4
Amount that Brandon received on 2nd Week = $14
Formula:
Amount received each week = 4 + (Week number - 1) x $2
Amount received on Week 15
= 4 + (15 - 1) x 2
= 4 + 14 x 2
= 4 + 28
= $32
(b)
Week number that Brandon received $18
= [(18 - 4) ÷ 2] + 1
= (14 ÷ 2) + 1
= 7 + 1
= 8
Answer(s): (a) $32; (b) 8