Mark saved $10 each day and Emily saved $
w more than Mark each day. After 5 weeks, they were still short of $32 to buy a laptop.
- How much did the laptop cost? Express your answer in terms of w.
- If w = $8, how much did the laptop cost?
(a)
Amount Mark saved per day = $10
Amount Emily saved per day = $(10 +
w)
Total amount both saved per day
= 10 + 10 +
w = $(20 +
w)
Number of days in 5 weeks
= 5 x 7
= 35
Total both saved in 5 weeks
= 35(20 +
w)
= 35 x 20 + 35 x
w = $(700 + 35
w)
Cost of the laptop
= 700 + 35
w + 32
= 700 + 32 + 35
w= $(732 + 35
w)
(b)
If
w = $8,
Cost of the laptop
= 732 + 35 x 8
= 732 + 280
= $1012
Answer(s): (a) $(732 + 35
w) or $(35
w + 732); (b) $1012
