Perry saved $11 each day and Yoko saved $
z more than Perry each day. After 4 weeks, they were still short of $32 to buy a computer.
- How much did the computer cost? Express your answer in terms of z.
- If z = $12, how much did the computer cost?
(a)
Amount Perry saved per day = $11
Amount Yoko saved per day = $(11 +
z)
Total amount both saved per day
= 11 + 11 +
z = $(22 +
z)
Number of days in 4 weeks
= 4 x 7
= 28
Total both saved in 4 weeks
= 28(22 +
z)
= 28 x 22 + 28 x
z = $(616 + 28
z)
Cost of the computer
= 616 + 28
z + 32
= 616 + 32 + 28
z= $(648 + 28
z)
(b)
If
z = $12,
Cost of the computer
= 648 + 28 x 12
= 648 + 336
= $984
Answer(s): (a) $(648 + 28
z) or $(28
z + 648); (b) $984
