PSLEVaidev had 3.9 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 k.
- If k = 25, 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 - 8) + (k + 15)
= k + k + k + 2k + k - 8 + 15
= (6 k + 7) cm
(b)
1 m = 100 cm
3.9 m = 390 cm
Total length of streamer used if k = 25
= 6 k + 7
= 6(25) + 7
= 150 + 7
= 157 cm
Total length of streamer not used
= 390 - 157
= 233 cm
1 cm = 0.01 m
233 cm = 2.33 m
Answer(s): (a) (6k + 7) cm; (b) 2.33 m