PSLEGeorge had 2.2 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 = 17, 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 - 3) + (b + 11)
= b + b + b + 2b + b - 3 + 11
= (6 b + 8) cm
(b)
1 m = 100 cm
2.2 m = 220 cm
Total length of streamer used if b = 17
= 6 b + 8
= 6(17) + 8
= 102 + 8
= 110 cm
Total length of streamer not used
= 220 - 110
= 110 cm
1 cm = 0.01 m
110 cm = 1.1 m
Answer(s): (a) (6b + 8) cm; (b) 1.1 m