Justin saved $12 each day and Jen saved $
t more than Justin each day. After 6 weeks, they were still short of $31 to buy a hard drive.
- How much did the hard drive cost? Express your answer in terms of t.
- If t = $5, how much did the hard drive cost?
(a)
Amount Justin saved per day = $12
Amount Jen saved per day = $(12 +
t)
Total amount both saved per day
= 12 + 12 +
t = $(24 +
t)
Number of days in 6 weeks
= 6 x 7
= 42
Total both saved in 6 weeks
= 42(24 +
t)
= 42 x 24 + 42 x
t = $(1008 + 42
t)
Cost of the hard drive
= 1008 + 42
t + 31
= 1008 + 31 + 42
t= $(1039 + 42
t)
(b)
If
t = $5,
Cost of the hard drive
= 1039 + 42 x 5
= 1039 + 210
= $1249
Answer(s): (a) $(1039 + 42
t) or $(42
t + 1039); (b) $1249
