PSLEGeorge had 2.1 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 p.
- If p = 13, how much of the streamer was not used to make the figure? Leave your answer in meters.
(a)
Total length of streamer used
= p + p + p + (2p - 3) + (p + 12)
= p + p + p + 2p + p - 3 + 12
= (6 p + 9) cm
(b)
1 m = 100 cm
2.1 m = 210 cm
Total length of streamer used if p = 13
= 6 p + 9
= 6(13) + 9
= 78 + 9
= 87 cm
Total length of streamer not used
= 210 - 87
= 123 cm
1 cm = 0.01 m
123 cm = 1.23 m
Answer(s): (a) (6p + 9) cm; (b) 1.23 m