PSLERiordan had 3.4 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 = 21, 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 - 8) + (p + 18)
= p + p + p + 2p + p - 8 + 18
= (6 p + 10) cm
(b)
1 m = 100 cm
3.4 m = 340 cm
Total length of streamer used if p = 21
= 6 p + 10
= 6(21) + 10
= 126 + 10
= 136 cm
Total length of streamer not used
= 340 - 136
= 204 cm
1 cm = 0.01 m
204 cm = 2.04 m
Answer(s): (a) (6p + 10) cm; (b) 2.04 m