PSLENeave had 3.7 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 h.
- If h = 19, how much of the streamer was not used to make the figure? Leave your answer in meters.
(a)
Total length of streamer used
= h + h + h + (2h - 6) + (h + 15)
= h + h + h + 2h + h - 6 + 15
= (6 h + 9) cm
(b)
1 m = 100 cm
3.7 m = 370 cm
Total length of streamer used if h = 19
= 6 h + 9
= 6(19) + 9
= 114 + 9
= 123 cm
Total length of streamer not used
= 370 - 123
= 247 cm
1 cm = 0.01 m
247 cm = 2.47 m
Answer(s): (a) (6h + 9) cm; (b) 2.47 m