PSLEOscar 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 i.
- If i = 28, how much of the streamer was not used to make the figure? Leave your answer in meters.
(a)
Total length of streamer used
= i + i + i + (3i - 6) + (i + 20)
= i + i + i + 3i + i - 6 + 20
= (7 i + 14) cm
(b)
1 m = 100 cm
3.2 m = 320 cm
Total length of streamer used if i = 28
= 7 i + 14
= 7(28) + 14
= 196 + 14
= 210 cm
Total length of streamer not used
= 320 - 210
= 110 cm
1 cm = 0.01 m
110 cm = 1.1 m
Answer(s): (a) (7i + 14) cm; (b) 1.1 m