PSLESimon had 3.7 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 e.
- If e = 26, how much of the thread was not used to make the figure? Leave your answer in meters.
(a)
Total length of thread used
= e + e + e + (2e - 9) + (e + 15)
= e + e + e + 2e + e - 9 + 15
= (6 e + 6) cm
(b)
1 m = 100 cm
3.7 m = 370 cm
Total length of thread used if e = 26
= 6 e + 6
= 6(26) + 6
= 156 + 6
= 162 cm
Total length of thread not used
= 370 - 162
= 208 cm
1 cm = 0.01 m
208 cm = 2.08 m
Answer(s): (a) (6e + 6) cm; (b) 2.08 m