PSLEJack had 2.6 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 w.
- If w = 20, how much of the streamer was not used to make the figure? Leave your answer in meters.
(a)
Total length of streamer used
= w + w + w + (3w - 9) + (w + 12)
= w + w + w + 3w + w - 9 + 12
= (7 w + 3) cm
(b)
1 m = 100 cm
2.6 m = 260 cm
Total length of streamer used if w = 20
= 7 w + 3
= 7(20) + 3
= 140 + 3
= 143 cm
Total length of streamer not used
= 260 - 143
= 117 cm
1 cm = 0.01 m
117 cm = 1.17 m
Answer(s): (a) (7w + 3) cm; (b) 1.17 m