Billy saved $8 each day and Jaslyn saved $
f more than Billy each day. After 6 weeks, they were still short of $31 to buy a television set.
- How much did the television set cost? Express your answer in terms of f.
- If f = $15, how much did the television set cost?
(a)
Amount Billy saved per day = $8
Amount Jaslyn saved per day = $(8 +
f)
Total amount both saved per day
= 8 + 8 +
f = $(16 +
f)
Number of days in 6 weeks
= 6 x 7
= 42
Total both saved in 6 weeks
= 42(16 +
f)
= 42 x 16 + 42 x
f = $(672 + 42
f)
Cost of the television set
= 672 + 42
f + 31
= 672 + 31 + 42
f= $(703 + 42
f)
(b)
If
f = $15,
Cost of the television set
= 703 + 42 x 15
= 703 + 630
= $1333
Answer(s): (a) $(703 + 42
f) or $(42
f + 703); (b) $1333
