Reggie saved $11 each day and Gillian saved $
j more than Reggie each day. After 2 weeks, they were still short of $32 to buy a hard drive.
- How much did the hard drive cost? Express your answer in terms of j.
- If j = $3, how much did the hard drive cost?
(a)
Amount Reggie saved per day = $11
Amount Gillian saved per day = $(11 +
j)
Total amount both saved per day
= 11 + 11 +
j = $(22 +
j)
Number of days in 2 weeks
= 2 x 7
= 14
Total both saved in 2 weeks
= 14(22 +
j)
= 14 x 22 + 14 x
j = $(308 + 14
j)
Cost of the hard drive
= 308 + 14
j + 32
= 308 + 32 + 14
j= $(340 + 14
j)
(b)
If
j = $3,
Cost of the hard drive
= 340 + 14 x 3
= 340 + 42
= $382
Answer(s): (a) $(340 + 14
j) or $(14
j + 340); (b) $382
