Tommy received $4 from his aunt in the 1st week of school and $8 in the 2nd week. Each week, he receives $4 more than the week before.
- How much money did he received in the 8th week?
- In which week did he receive $28?
(a)
Amount that Tommy received on 1st Week = $4
Amount that Tommy received on 2nd Week = $7
Formula:
Amount received each week = 4 + (Week number - 1) x $4
Amount received on Week 8
= 4 + (8 - 1) x 4
= 4 + 7 x 4
= 4 + 28
= $32
(b)
Week number that Tommy received $28
= [(28 - 4) ÷ 4] + 1
= (24 ÷ 4) + 1
= 6 + 1
= 7
Answer(s): (a) $32; (b) 7