Peter saved $11 each day and Vanessa saved $
t more than Peter each day. After 2 weeks, they were still short of $31 to buy a laptop.
- How much did the laptop cost? Express your answer in terms of t.
- If t = $9, how much did the laptop cost?
(a)
Amount Peter saved per day = $11
Amount Vanessa saved per day = $(11 +
t)
Total amount both saved per day
= 11 + 11 +
t = $(22 +
t)
Number of days in 2 weeks
= 2 x 7
= 14
Total both saved in 2 weeks
= 14(22 +
t)
= 14 x 22 + 14 x
t = $(308 + 14
t)
Cost of the laptop
= 308 + 14
t + 31
= 308 + 31 + 14
t= $(339 + 14
t)
(b)
If
t = $9,
Cost of the laptop
= 339 + 14 x 9
= 339 + 126
= $465
Answer(s): (a) $(339 + 14
t) or $(14
t + 339); (b) $465
