Liam saved $11 each day and Tammy saved $
r more than Liam each day. After 4 weeks, they were still short of $30 to buy a printer.
- How much did the printer cost? Express your answer in terms of r.
- If r = $4, how much did the printer cost?
(a)
Amount Liam saved per day = $11
Amount Tammy saved per day = $(11 +
r)
Total amount both saved per day
= 11 + 11 +
r = $(22 +
r)
Number of days in 4 weeks
= 4 x 7
= 28
Total both saved in 4 weeks
= 28(22 +
r)
= 28 x 22 + 28 x
r = $(616 + 28
r)
Cost of the printer
= 616 + 28
r + 30
= 616 + 30 + 28
r= $(646 + 28
r)
(b)
If
r = $4,
Cost of the printer
= 646 + 28 x 4
= 646 + 112
= $758
Answer(s): (a) $(646 + 28
r) or $(28
r + 646); (b) $758
