PSLEPaul had 2.9 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 s.
- If s = 24, how much of the streamer was not used to make the figure? Leave your answer in meters.
(a)
Total length of streamer used
= s + s + s + (3s - 6) + (s + 11)
= s + s + s + 3s + s - 6 + 11
= (7 s + 5) cm
(b)
1 m = 100 cm
2.9 m = 290 cm
Total length of streamer used if s = 24
= 7 s + 5
= 7(24) + 5
= 168 + 5
= 173 cm
Total length of streamer not used
= 290 - 173
= 117 cm
1 cm = 0.01 m
117 cm = 1.17 m
Answer(s): (a) (7s + 5) cm; (b) 1.17 m