Nick saved $9 each day and Ivory saved $
f more than Nick each day. After 3 weeks, they were still short of $31 to buy a printer.
- How much did the printer cost? Express your answer in terms of f.
- If f = $8, how much did the printer cost?
(a)
Amount Nick saved per day = $9
Amount Ivory saved per day = $(9 +
f)
Total amount both saved per day
= 9 + 9 +
f = $(18 +
f)
Number of days in 3 weeks
= 3 x 7
= 21
Total both saved in 3 weeks
= 21(18 +
f)
= 21 x 18 + 21 x
f = $(378 + 21
f)
Cost of the printer
= 378 + 21
f + 31
= 378 + 31 + 21
f= $(409 + 21
f)
(b)
If
f = $8,
Cost of the printer
= 409 + 21 x 8
= 409 + 168
= $577
Answer(s): (a) $(409 + 21
f) or $(21
f + 409); (b) $577
