Seth saved $9 each day and Winnie saved $
s more than Seth each day. After 4 weeks, they were still short of $32 to buy a laptop.
- How much did the laptop cost? Express your answer in terms of s.
- If s = $6, how much did the laptop cost?
(a)
Amount Seth saved per day = $9
Amount Winnie saved per day = $(9 +
s)
Total amount both saved per day
= 9 + 9 +
s = $(18 +
s)
Number of days in 4 weeks
= 4 x 7
= 28
Total both saved in 4 weeks
= 28(18 +
s)
= 28 x 18 + 28 x
s = $(504 + 28
s)
Cost of the laptop
= 504 + 28
s + 32
= 504 + 32 + 28
s= $(536 + 28
s)
(b)
If
s = $6,
Cost of the laptop
= 536 + 28 x 6
= 536 + 168
= $704
Answer(s): (a) $(536 + 28
s) or $(28
s + 536); (b) $704
