PSLEAndy had 3.2 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 k.
- If k = 13, how much of the streamer was not used to make the figure? Leave your answer in meters.
(a)
Total length of streamer used
= k + k + k + (2k - 5) + (k + 15)
= k + k + k + 2k + k - 5 + 15
= (6 k + 10) cm
(b)
1 m = 100 cm
3.2 m = 320 cm
Total length of streamer used if k = 13
= 6 k + 10
= 6(13) + 10
= 78 + 10
= 88 cm
Total length of streamer not used
= 320 - 88
= 232 cm
1 cm = 0.01 m
232 cm = 2.32 m
Answer(s): (a) (6k + 10) cm; (b) 2.32 m