Japheth saved $10 each day and Fanny saved $
j more than Japheth each day. After 2 weeks, they were still short of $28 to buy a computer.
- How much did the computer cost? Express your answer in terms of j.
- If j = $8, how much did the computer cost?
(a)
Amount Japheth saved per day = $10
Amount Fanny saved per day = $(10 +
j)
Total amount both saved per day
= 10 + 10 +
j = $(20 +
j)
Number of days in 2 weeks
= 2 x 7
= 14
Total both saved in 2 weeks
= 14(20 +
j)
= 14 x 20 + 14 x
j = $(280 + 14
j)
Cost of the computer
= 280 + 14
j + 28
= 280 + 28 + 14
j= $(308 + 14
j)
(b)
If
j = $8,
Cost of the computer
= 308 + 14 x 8
= 308 + 112
= $420
Answer(s): (a) $(308 + 14
j) or $(14
j + 308); (b) $420
