Andy saved $12 each day and Winnie saved $
c more than Andy 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 c.
- If c = $13, how much did the laptop cost?
(a)
Amount Andy saved per day = $12
Amount Winnie saved per day = $(12 +
c)
Total amount both saved per day
= 12 + 12 +
c = $(24 +
c)
Number of days in 2 weeks
= 2 x 7
= 14
Total both saved in 2 weeks
= 14(24 +
c)
= 14 x 24 + 14 x
c = $(336 + 14
c)
Cost of the laptop
= 336 + 14
c + 31
= 336 + 31 + 14
c= $(367 + 14
c)
(b)
If
c = $13,
Cost of the laptop
= 367 + 14 x 13
= 367 + 182
= $549
Answer(s): (a) $(367 + 14
c) or $(14
c + 367); (b) $549
