PSLEAhmad had 3.1 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 v.
- If v = 12, how much of the streamer was not used to make the figure? Leave your answer in meters.
(a)
Total length of streamer used
= v + v + v + (2v - 9) + (v + 18)
= v + v + v + 2v + v - 9 + 18
= (6 v + 9) cm
(b)
1 m = 100 cm
3.1 m = 310 cm
Total length of streamer used if v = 12
= 6 v + 9
= 6(12) + 9
= 72 + 9
= 81 cm
Total length of streamer not used
= 310 - 81
= 229 cm
1 cm = 0.01 m
229 cm = 2.29 m
Answer(s): (a) (6v + 9) cm; (b) 2.29 m