PSLELiam had 3.8 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 + (3b - 7) + (b + 14)
= b + b + b + 3b + b - 7 + 14
= (7 b + 7) cm
(b)
1 m = 100 cm
3.8 m = 380 cm
Total length of streamer used if b = 13
= 7 b + 7
= 7(13) + 7
= 91 + 7
= 98 cm
Total length of streamer not used
= 380 - 98
= 282 cm
1 cm = 0.01 m
282 cm = 2.82 m
Answer(s): (a) (7b + 7) cm; (b) 2.82 m