PSLEGlen 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 b.
- If b = 13, how much of the streamer was not used to make the figure? Leave your answer in meters.
(a)
Total length of streamer used
= b + b + b + (2b - 4) + (b + 19)
= b + b + b + 2b + b - 4 + 19
= (6 b + 15) cm
(b)
1 m = 100 cm
2.9 m = 290 cm
Total length of streamer used if b = 13
= 6 b + 15
= 6(13) + 15
= 78 + 15
= 93 cm
Total length of streamer not used
= 290 - 93
= 197 cm
1 cm = 0.01 m
197 cm = 1.97 m
Answer(s): (a) (6b + 15) cm; (b) 1.97 m