Elijah saved $8 each day and Irene saved $
b more than Elijah each day. After 4 weeks, they were still short of $29 to buy a computer.
- How much did the computer cost? Express your answer in terms of b.
- If b = $17, how much did the computer cost?
(a)
Amount Elijah saved per day = $8
Amount Irene saved per day = $(8 +
b)
Total amount both saved per day
= 8 + 8 +
b = $(16 +
b)
Number of days in 4 weeks
= 4 x 7
= 28
Total both saved in 4 weeks
= 28(16 +
b)
= 28 x 16 + 28 x
b = $(448 + 28
b)
Cost of the computer
= 448 + 28
b + 29
= 448 + 29 + 28
b= $(477 + 28
b)
(b)
If
b = $17,
Cost of the computer
= 477 + 28 x 17
= 477 + 476
= $953
Answer(s): (a) $(477 + 28
b) or $(28
b + 477); (b) $953
