PSLEJack had 2.1 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 t.
- If t = 13, 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 - 3) + (t + 15)
= t + t + t + 2t + t - 3 + 15
= (6 t + 12) cm
(b)
1 m = 100 cm
2.1 m = 210 cm
Total length of streamer used if t = 13
= 6 t + 12
= 6(13) + 12
= 78 + 12
= 90 cm
Total length of streamer not used
= 210 - 90
= 120 cm
1 cm = 0.01 m
120 cm = 1.2 m
Answer(s): (a) (6t + 12) cm; (b) 1.2 m