Lee saved $12 each day and Kathy saved $
w more than Lee each day. After 2 weeks, they were still short of $31 to buy a laptop.
- How much did the laptop cost? Express your answer in terms of w.
- If w = $8, how much did the laptop cost?
(a)
Amount Lee saved per day = $12
Amount Kathy saved per day = $(12 +
w)
Total amount both saved per day
= 12 + 12 +
w = $(24 +
w)
Number of days in 2 weeks
= 2 x 7
= 14
Total both saved in 2 weeks
= 14(24 +
w)
= 14 x 24 + 14 x
w = $(336 + 14
w)
Cost of the laptop
= 336 + 14
w + 31
= 336 + 31 + 14
w= $(367 + 14
w)
(b)
If
w = $8,
Cost of the laptop
= 367 + 14 x 8
= 367 + 112
= $479
Answer(s): (a) $(367 + 14
w) or $(14
w + 367); (b) $479
