Seth saved $10 each day and Roshel saved $
t more than Seth each day. After 6 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 t.
- If t = $9, how much did the hard drive cost?
(a)
Amount Seth saved per day = $10
Amount Roshel saved per day = $(10 +
t)
Total amount both saved per day
= 10 + 10 +
t = $(20 +
t)
Number of days in 6 weeks
= 6 x 7
= 42
Total both saved in 6 weeks
= 42(20 +
t)
= 42 x 20 + 42 x
t = $(840 + 42
t)
Cost of the hard drive
= 840 + 42
t + 30
= 840 + 30 + 42
t= $(870 + 42
t)
(b)
If
t = $9,
Cost of the hard drive
= 870 + 42 x 9
= 870 + 378
= $1248
Answer(s): (a) $(870 + 42
t) or $(42
t + 870); (b) $1248
