Glen saved $11 each day and Gabby saved $
k more than Glen each day. After 3 weeks, they were still short of $28 to buy a projector.
- How much did the projector cost? Express your answer in terms of k.
- If k = $6, how much did the projector cost?
(a)
Amount Glen saved per day = $11
Amount Gabby saved per day = $(11 +
k)
Total amount both saved per day
= 11 + 11 +
k = $(22 +
k)
Number of days in 3 weeks
= 3 x 7
= 21
Total both saved in 3 weeks
= 21(22 +
k)
= 21 x 22 + 21 x
k = $(462 + 21
k)
Cost of the projector
= 462 + 21
k + 28
= 462 + 28 + 21
k= $(490 + 21
k)
(b)
If
k = $6,
Cost of the projector
= 490 + 21 x 6
= 490 + 126
= $616
Answer(s): (a) $(490 + 21
k) or $(21
k + 490); (b) $616
