Paul saved $11 each day and Kathy saved $
d more than Paul each day. After 5 weeks, they were still short of $32 to buy a laptop.
- How much did the laptop cost? Express your answer in terms of d.
- If d = $15, how much did the laptop cost?
(a)
Amount Paul saved per day = $11
Amount Kathy saved per day = $(11 +
d)
Total amount both saved per day
= 11 + 11 +
d = $(22 +
d)
Number of days in 5 weeks
= 5 x 7
= 35
Total both saved in 5 weeks
= 35(22 +
d)
= 35 x 22 + 35 x
d = $(770 + 35
d)
Cost of the laptop
= 770 + 35
d + 32
= 770 + 32 + 35
d= $(802 + 35
d)
(b)
If
d = $15,
Cost of the laptop
= 802 + 35 x 15
= 802 + 525
= $1327
Answer(s): (a) $(802 + 35
d) or $(35
d + 802); (b) $1327
