Elijah saved $9 each day and Anna saved $
s more than Elijah each day. After 4 weeks, they were still short of $29 to buy a massage chair.
- How much did the massage chair cost? Express your answer in terms of s.
- If s = $14, how much did the massage chair cost?
(a)
Amount Elijah saved per day = $9
Amount Anna saved per day = $(9 +
s)
Total amount both saved per day
= 9 + 9 +
s = $(18 +
s)
Number of days in 4 weeks
= 4 x 7
= 28
Total both saved in 4 weeks
= 28(18 +
s)
= 28 x 18 + 28 x
s = $(504 + 28
s)
Cost of the massage chair
= 504 + 28
s + 29
= 504 + 29 + 28
s= $(533 + 28
s)
(b)
If
s = $14,
Cost of the massage chair
= 533 + 28 x 14
= 533 + 392
= $925
Answer(s): (a) $(533 + 28
s) or $(28
s + 533); (b) $925
