Jenson received $1 from his mother in the 1st week of school and $6 in the 2nd week. Each week, he receives $5 more than the week before.
- How much money did he received in the 9th week?
- In which week did he receive $16?
(a)
Amount that Jenson received on 1st Week = $1
Amount that Jenson received on 2nd Week = $8
Formula:
Amount received each week = 1 + (Week number - 1) x $5
Amount received on Week 9
= 1 + (9 - 1) x 5
= 1 + 8 x 5
= 1 + 40
= $41
(b)
Week number that Jenson received $16
= [(16 - 1) ÷ 5] + 1
= (15 ÷ 5) + 1
= 3 + 1
= 4
Answer(s): (a) $41; (b) 4