PSLEMichael had 3.4 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 = 14, 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 + (3t - 9) + (t + 17)
= t + t + t + 3t + t - 9 + 17
= (7 t + 8) cm
(b)
1 m = 100 cm
3.4 m = 340 cm
Total length of streamer used if t = 14
= 7 t + 8
= 7(14) + 8
= 98 + 8
= 106 cm
Total length of streamer not used
= 340 - 106
= 234 cm
1 cm = 0.01 m
234 cm = 2.34 m
Answer(s): (a) (7t + 8) cm; (b) 2.34 m