PSLEJeremy 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 d.
- If d = 12, how much of the streamer was not used to make the figure? Leave your answer in meters.
(a)
Total length of streamer used
= d + d + d + (3d - 4) + (d + 17)
= d + d + d + 3d + d - 4 + 17
= (7 d + 13) cm
(b)
1 m = 100 cm
3.7 m = 370 cm
Total length of streamer used if d = 12
= 7 d + 13
= 7(12) + 13
= 84 + 13
= 97 cm
Total length of streamer not used
= 370 - 97
= 273 cm
1 cm = 0.01 m
273 cm = 2.73 m
Answer(s): (a) (7d + 13) cm; (b) 2.73 m