Gabriel saved $9 each day and Eva saved $
e more than Gabriel each day. After 3 weeks, they were still short of $29 to buy a projector.
- How much did the projector cost? Express your answer in terms of e.
- If e = $17, how much did the projector cost?
(a)
Amount Gabriel saved per day = $9
Amount Eva saved per day = $(9 +
e)
Total amount both saved per day
= 9 + 9 +
e = $(18 +
e)
Number of days in 3 weeks
= 3 x 7
= 21
Total both saved in 3 weeks
= 21(18 +
e)
= 21 x 18 + 21 x
e = $(378 + 21
e)
Cost of the projector
= 378 + 21
e + 29
= 378 + 29 + 21
e= $(407 + 21
e)
(b)
If
e = $17,
Cost of the projector
= 407 + 21 x 17
= 407 + 357
= $764
Answer(s): (a) $(407 + 21
e) or $(21
e + 407); (b) $764
