PSLEOwen had 2.6 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 t.
- If t = 20, how much of the streamer was not used to make the figure? Leave your answer in meters.
(a)
Total length of streamer used
= t + t + t + (2t - 4) + (t + 12)
= t + t + t + 2t + t - 4 + 12
= (6 t + 8) cm
(b)
1 m = 100 cm
2.6 m = 260 cm
Total length of streamer used if t = 20
= 6 t + 8
= 6(20) + 8
= 120 + 8
= 128 cm
Total length of streamer not used
= 260 - 128
= 132 cm
1 cm = 0.01 m
132 cm = 1.32 m
Answer(s): (a) (6t + 8) cm; (b) 1.32 m