Ivan saved $9 each day and Julie saved $
g more than Ivan each day. After 5 weeks, they were still short of $32 to buy a hi-fi system.
- How much did the hi-fi system cost? Express your answer in terms of g.
- If g = $4, how much did the hi-fi system cost?
(a)
Amount Ivan saved per day = $9
Amount Julie saved per day = $(9 +
g)
Total amount both saved per day
= 9 + 9 +
g = $(18 +
g)
Number of days in 5 weeks
= 5 x 7
= 35
Total both saved in 5 weeks
= 35(18 +
g)
= 35 x 18 + 35 x
g = $(630 + 35
g)
Cost of the hi-fi system
= 630 + 35
g + 32
= 630 + 32 + 35
g= $(662 + 35
g)
(b)
If
g = $4,
Cost of the hi-fi system
= 662 + 35 x 4
= 662 + 140
= $802
Answer(s): (a) $(662 + 35
g) or $(35
g + 662); (b) $802
