Wesley saved $9 each day and Nora saved $
d more than Wesley each day. After 2 weeks, they were still short of $30 to buy a hard drive.
- How much did the hard drive cost? Express your answer in terms of d.
- If d = $17, how much did the hard drive cost?
(a)
Amount Wesley saved per day = $9
Amount Nora saved per day = $(9 +
d)
Total amount both saved per day
= 9 + 9 +
d = $(18 +
d)
Number of days in 2 weeks
= 2 x 7
= 14
Total both saved in 2 weeks
= 14(18 +
d)
= 14 x 18 + 14 x
d = $(252 + 14
d)
Cost of the hard drive
= 252 + 14
d + 30
= 252 + 30 + 14
d= $(282 + 14
d)
(b)
If
d = $17,
Cost of the hard drive
= 282 + 14 x 17
= 282 + 238
= $520
Answer(s): (a) $(282 + 14
d) or $(14
d + 282); (b) $520