PSLEWesley 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 c.
- If c = 12, how much of the streamer was not used to make the figure? Leave your answer in meters.
(a)
Total length of streamer used
= c + c + c + (3c - 7) + (c + 18)
= c + c + c + 3c + c - 7 + 18
= (7 c + 11) cm
(b)
1 m = 100 cm
3.4 m = 340 cm
Total length of streamer used if c = 12
= 7 c + 11
= 7(12) + 11
= 84 + 11
= 95 cm
Total length of streamer not used
= 340 - 95
= 245 cm
1 cm = 0.01 m
245 cm = 2.45 m
Answer(s): (a) (7c + 11) cm; (b) 2.45 m