Cody saved $8 each day and Zoe saved $
w more than Cody each day. After 3 weeks, they were still short of $32 to buy a computer.
- How much did the computer cost? Express your answer in terms of w.
- If w = $13, how much did the computer cost?
(a)
Amount Cody saved per day = $8
Amount Zoe saved per day = $(8 +
w)
Total amount both saved per day
= 8 + 8 +
w = $(16 +
w)
Number of days in 3 weeks
= 3 x 7
= 21
Total both saved in 3 weeks
= 21(16 +
w)
= 21 x 16 + 21 x
w = $(336 + 21
w)
Cost of the computer
= 336 + 21
w + 32
= 336 + 32 + 21
w= $(368 + 21
w)
(b)
If
w = $13,
Cost of the computer
= 368 + 21 x 13
= 368 + 273
= $641
Answer(s): (a) $(368 + 21
w) or $(21
w + 368); (b) $641
