Henry received $5 from his uncle in the 1st week of school and $12 in the 2nd week. Each week, he receives $7 more than the week before.
- How much money did he received in the 12th week?
- In which week did he receive $26?
(a)
Amount that Henry received on 1st Week = $5
Amount that Henry received on 2nd Week = $11
Formula:
Amount received each week = 5 + (Week number - 1) x $7
Amount received on Week 12
= 5 + (12 - 1) x 7
= 5 + 11 x 7
= 5 + 77
= $82
(b)
Week number that Henry received $26
= [(26 - 5) ÷ 7] + 1
= (21 ÷ 7) + 1
= 3 + 1
= 4
Answer(s): (a) $82; (b) 4