Ivan saved $9 each day and Wendy saved $
f more than Ivan each day. After 2 weeks, they were still short of $32 to buy a laptop.
- How much did the laptop cost? Express your answer in terms of f.
- If f = $15, how much did the laptop cost?
(a)
Amount Ivan saved per day = $9
Amount Wendy saved per day = $(9 +
f)
Total amount both saved per day
= 9 + 9 +
f = $(18 +
f)
Number of days in 2 weeks
= 2 x 7
= 14
Total both saved in 2 weeks
= 14(18 +
f)
= 14 x 18 + 14 x
f = $(252 + 14
f)
Cost of the laptop
= 252 + 14
f + 32
= 252 + 32 + 14
f= $(284 + 14
f)
(b)
If
f = $15,
Cost of the laptop
= 284 + 14 x 15
= 284 + 210
= $494
Answer(s): (a) $(284 + 14
f) or $(14
f + 284); (b) $494
