Sean saved $11 each day and Min saved $
r more than Sean each day. After 4 weeks, they were still short of $32 to buy a tablet.
- How much did the tablet cost? Express your answer in terms of r.
- If r = $13, how much did the tablet cost?
(a)
Amount Sean saved per day = $11
Amount Min saved per day = $(11 +
r)
Total amount both saved per day
= 11 + 11 +
r = $(22 +
r)
Number of days in 4 weeks
= 4 x 7
= 28
Total both saved in 4 weeks
= 28(22 +
r)
= 28 x 22 + 28 x
r = $(616 + 28
r)
Cost of the tablet
= 616 + 28
r + 32
= 616 + 32 + 28
r= $(648 + 28
r)
(b)
If
r = $13,
Cost of the tablet
= 648 + 28 x 13
= 648 + 364
= $1012
Answer(s): (a) $(648 + 28
r) or $(28
r + 648); (b) $1012
