Cole saved $11 each day and Fiona saved $
f more than Cole each day. After 4 weeks, they were still short of $32 to buy a projector.
- How much did the projector cost? Express your answer in terms of f.
- If f = $18, how much did the projector cost?
(a)
Amount Cole saved per day = $11
Amount Fiona saved per day = $(11 +
f)
Total amount both saved per day
= 11 + 11 +
f = $(22 +
f)
Number of days in 4 weeks
= 4 x 7
= 28
Total both saved in 4 weeks
= 28(22 +
f)
= 28 x 22 + 28 x
f = $(616 + 28
f)
Cost of the projector
= 616 + 28
f + 32
= 616 + 32 + 28
f= $(648 + 28
f)
(b)
If
f = $18,
Cost of the projector
= 648 + 28 x 18
= 648 + 504
= $1152
Answer(s): (a) $(648 + 28
f) or $(28
f + 648); (b) $1152
