PSLEAlbert had 1.9 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 + (2d - 5) + (d + 15)
= d + d + d + 2d + d - 5 + 15
= (6 d + 10) cm
(b)
1 m = 100 cm
1.9 m = 190 cm
Total length of streamer used if d = 12
= 6 d + 10
= 6(12) + 10
= 72 + 10
= 82 cm
Total length of streamer not used
= 190 - 82
= 108 cm
1 cm = 0.01 m
108 cm = 1.08 m
Answer(s): (a) (6d + 10) cm; (b) 1.08 m