PSLESeth had 3.3 m of thread. He used some of it to make the figure as shown.
- How much of the thread did Andy use to make the figure? Leave your answer in the simplest form in terms of s.
- If s = 17, how much of the thread was not used to make the figure? Leave your answer in meters.
(a)
Total length of thread used
= s + s + s + (3s - 8) + (s + 16)
= s + s + s + 3s + s - 8 + 16
= (7 s + 8) cm
(b)
1 m = 100 cm
3.3 m = 330 cm
Total length of thread used if s = 17
= 7 s + 8
= 7(17) + 8
= 119 + 8
= 127 cm
Total length of thread not used
= 330 - 127
= 203 cm
1 cm = 0.01 m
203 cm = 2.03 m
Answer(s): (a) (7s + 8) cm; (b) 2.03 m