Albert saved $10 each day and Tiffany saved $
q more than Albert each day. After 6 weeks, they were still short of $30 to buy a laptop.
- How much did the laptop cost? Express your answer in terms of q.
- If q = $10, how much did the laptop cost?
(a)
Amount Albert saved per day = $10
Amount Tiffany saved per day = $(10 +
q)
Total amount both saved per day
= 10 + 10 +
q = $(20 +
q)
Number of days in 6 weeks
= 6 x 7
= 42
Total both saved in 6 weeks
= 42(20 +
q)
= 42 x 20 + 42 x
q = $(840 + 42
q)
Cost of the laptop
= 840 + 42
q + 30
= 840 + 30 + 42
q= $(870 + 42
q)
(b)
If
q = $10,
Cost of the laptop
= 870 + 42 x 10
= 870 + 420
= $1290
Answer(s): (a) $(870 + 42
q) or $(42
q + 870); (b) $1290
