Ian saved $10 each day and Jade saved $
f more than Ian each day. After 4 weeks, they were still short of $29 to buy a tablet.
- How much did the tablet cost? Express your answer in terms of f.
- If f = $20, how much did the tablet cost?
(a)
Amount Ian saved per day = $10
Amount Jade saved per day = $(10 +
f)
Total amount both saved per day
= 10 + 10 +
f = $(20 +
f)
Number of days in 4 weeks
= 4 x 7
= 28
Total both saved in 4 weeks
= 28(20 +
f)
= 28 x 20 + 28 x
f = $(560 + 28
f)
Cost of the tablet
= 560 + 28
f + 29
= 560 + 29 + 28
f= $(589 + 28
f)
(b)
If
f = $20,
Cost of the tablet
= 589 + 28 x 20
= 589 + 560
= $1149
Answer(s): (a) $(589 + 28
f) or $(28
f + 589); (b) $1149
