PSLEKen had 3.1 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 = 23, 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 + 18)
= i + i + i + 3i + i - 6 + 18
= (7 i + 12) cm
(b)
1 m = 100 cm
3.1 m = 310 cm
Total length of streamer used if i = 23
= 7 i + 12
= 7(23) + 12
= 161 + 12
= 173 cm
Total length of streamer not used
= 310 - 173
= 137 cm
1 cm = 0.01 m
137 cm = 1.37 m
Answer(s): (a) (7i + 12) cm; (b) 1.37 m