Zeph saved $11 each day and Shannon saved $
d more than Zeph each day. After 6 weeks, they were still short of $32 to buy a hard drive.
- How much did the hard drive cost? Express your answer in terms of d.
- If d = $18, how much did the hard drive cost?
(a)
Amount Zeph saved per day = $11
Amount Shannon saved per day = $(11 +
d)
Total amount both saved per day
= 11 + 11 +
d = $(22 +
d)
Number of days in 6 weeks
= 6 x 7
= 42
Total both saved in 6 weeks
= 42(22 +
d)
= 42 x 22 + 42 x
d = $(924 + 42
d)
Cost of the hard drive
= 924 + 42
d + 32
= 924 + 32 + 42
d= $(956 + 42
d)
(b)
If
d = $18,
Cost of the hard drive
= 956 + 42 x 18
= 956 + 756
= $1712
Answer(s): (a) $(956 + 42
d) or $(42
d + 956); (b) $1712
