PSLETom had 2.3 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 = 15, 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 + 15)
= t + t + t + 2t + t - 4 + 15
= (6 t + 11) cm
(b)
1 m = 100 cm
2.3 m = 230 cm
Total length of streamer used if t = 15
= 6 t + 11
= 6(15) + 11
= 90 + 11
= 101 cm
Total length of streamer not used
= 230 - 101
= 129 cm
1 cm = 0.01 m
129 cm = 1.29 m
Answer(s): (a) (6t + 11) cm; (b) 1.29 m