Daniel saved $9 each day and Rachel saved $
x more than Daniel each day. After 5 weeks, they were still short of $30 to buy a tablet.
- How much did the tablet cost? Express your answer in terms of x.
- If x = $14, how much did the tablet cost?
(a)
Amount Daniel saved per day = $9
Amount Rachel saved per day = $(9 +
x)
Total amount both saved per day
= 9 + 9 +
x = $(18 +
x)
Number of days in 5 weeks
= 5 x 7
= 35
Total both saved in 5 weeks
= 35(18 +
x)
= 35 x 18 + 35 x
x = $(630 + 35
x)
Cost of the tablet
= 630 + 35
x + 30
= 630 + 30 + 35
x= $(660 + 35
x)
(b)
If
x = $14,
Cost of the tablet
= 660 + 35 x 14
= 660 + 490
= $1150
Answer(s): (a) $(660 + 35
x) or $(35
x + 660); (b) $1150
