PSLETom had 3.6 m of streamer. He used some of it to make the figure as shown.
- How much of the streamer did Andy use to make the figure? Leave your answer in the simplest form in terms of g.
- If g = 11, how much of the streamer was not used to make the figure? Leave your answer in meters.
(a)
Total length of streamer used
= g + g + g + (2g - 3) + (g + 18)
= g + g + g + 2g + g - 3 + 18
= (6 g + 15) cm
(b)
1 m = 100 cm
3.6 m = 360 cm
Total length of streamer used if g = 11
= 6 g + 15
= 6(11) + 15
= 66 + 15
= 81 cm
Total length of streamer not used
= 360 - 81
= 279 cm
1 cm = 0.01 m
279 cm = 2.79 m
Answer(s): (a) (6g + 15) cm; (b) 2.79 m