PSLEReggie 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 c.
- If c = 24, 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 + (2c - 7) + (c + 19)
= c + c + c + 2c + c - 7 + 19
= (6 c + 12) cm
(b)
1 m = 100 cm
3.1 m = 310 cm
Total length of streamer used if c = 24
= 6 c + 12
= 6(24) + 12
= 144 + 12
= 156 cm
Total length of streamer not used
= 310 - 156
= 154 cm
1 cm = 0.01 m
154 cm = 1.54 m
Answer(s): (a) (6c + 12) cm; (b) 1.54 m