Julian saved $8 each day and Abi saved $
y more than Julian each day. After 4 weeks, they were still short of $28 to buy a projector.
- How much did the projector cost? Express your answer in terms of y.
- If y = $7, how much did the projector cost?
(a)
Amount Julian saved per day = $8
Amount Abi saved per day = $(8 +
y)
Total amount both saved per day
= 8 + 8 +
y = $(16 +
y)
Number of days in 4 weeks
= 4 x 7
= 28
Total both saved in 4 weeks
= 28(16 +
y)
= 28 x 16 + 28 x
y = $(448 + 28
y)
Cost of the projector
= 448 + 28
y + 28
= 448 + 28 + 28
y= $(476 + 28
y)
(b)
If
y = $7,
Cost of the projector
= 476 + 28 x 7
= 476 + 196
= $672
Answer(s): (a) $(476 + 28
y) or $(28
y + 476); (b) $672
