Warren saved $9 each day and Jade saved $
w more than Warren each day. After 5 weeks, they were still short of $31 to buy a projector.
- How much did the projector cost? Express your answer in terms of w.
- If w = $16, how much did the projector cost?
(a)
Amount Warren saved per day = $9
Amount Jade saved per day = $(9 +
w)
Total amount both saved per day
= 9 + 9 +
w = $(18 +
w)
Number of days in 5 weeks
= 5 x 7
= 35
Total both saved in 5 weeks
= 35(18 +
w)
= 35 x 18 + 35 x
w = $(630 + 35
w)
Cost of the projector
= 630 + 35
w + 31
= 630 + 31 + 35
w= $(661 + 35
w)
(b)
If
w = $16,
Cost of the projector
= 661 + 35 x 16
= 661 + 560
= $1221
Answer(s): (a) $(661 + 35
w) or $(35
w + 661); (b) $1221
