Andy saved $8 each day and Gabby saved $
r more than Andy 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 = $2, how much did the tablet cost?
(a)
Amount Andy saved per day = $8
Amount Gabby saved per day = $(8 +
r)
Total amount both saved per day
= 8 + 8 +
r = $(16 +
r)
Number of days in 4 weeks
= 4 x 7
= 28
Total both saved in 4 weeks
= 28(16 +
r)
= 28 x 16 + 28 x
r = $(448 + 28
r)
Cost of the tablet
= 448 + 28
r + 32
= 448 + 32 + 28
r= $(480 + 28
r)
(b)
If
r = $2,
Cost of the tablet
= 480 + 28 x 2
= 480 + 56
= $536
Answer(s): (a) $(480 + 28
r) or $(28
r + 480); (b) $536
