Bryan saved $12 each day and Usha saved $
k more than Bryan 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 k.
- If k = $7, how much did the computer cost?
(a)
Amount Bryan saved per day = $12
Amount Usha saved per day = $(12 +
k)
Total amount both saved per day
= 12 + 12 +
k = $(24 +
k)
Number of days in 4 weeks
= 4 x 7
= 28
Total both saved in 4 weeks
= 28(24 +
k)
= 28 x 24 + 28 x
k = $(672 + 28
k)
Cost of the computer
= 672 + 28
k + 32
= 672 + 32 + 28
k= $(704 + 28
k)
(b)
If
k = $7,
Cost of the computer
= 704 + 28 x 7
= 704 + 196
= $900
Answer(s): (a) $(704 + 28
k) or $(28
k + 704); (b) $900