PSLEZane had 3.3 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 = 18, 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 - 10) + (i + 19)
= i + i + i + 3i + i - 10 + 19
= (7 i + 9) cm
(b)
1 m = 100 cm
3.3 m = 330 cm
Total length of streamer used if i = 18
= 7 i + 9
= 7(18) + 9
= 126 + 9
= 135 cm
Total length of streamer not used
= 330 - 135
= 195 cm
1 cm = 0.01 m
195 cm = 1.95 m
Answer(s): (a) (7i + 9) cm; (b) 1.95 m