Peter saved $11 each day and Rachel saved $
q more than Peter each day. After 3 weeks, they were still short of $28 to buy a printer.
- How much did the printer cost? Express your answer in terms of q.
- If q = $14, how much did the printer cost?
(a)
Amount Peter saved per day = $11
Amount Rachel saved per day = $(11 +
q)
Total amount both saved per day
= 11 + 11 +
q = $(22 +
q)
Number of days in 3 weeks
= 3 x 7
= 21
Total both saved in 3 weeks
= 21(22 +
q)
= 21 x 22 + 21 x
q = $(462 + 21
q)
Cost of the printer
= 462 + 21
q + 28
= 462 + 28 + 21
q= $(490 + 21
q)
(b)
If
q = $14,
Cost of the printer
= 490 + 21 x 14
= 490 + 294
= $784
Answer(s): (a) $(490 + 21
q) or $(21
q + 490); (b) $784
