PSLENick had 3.5 m of rope. He used some of it to make the figure as shown.
- How much of the rope did Andy use to make the figure? Leave your answer in the simplest form in terms of m.
- If m = 12, how much of the rope was not used to make the figure? Leave your answer in meters.
(a)
Total length of rope used
= m + m + m + (3m - 10) + (m + 17)
= m + m + m + 3m + m - 10 + 17
= (7 m + 7) cm
(b)
1 m = 100 cm
3.5 m = 350 cm
Total length of rope used if m = 12
= 7 m + 7
= 7(12) + 7
= 84 + 7
= 91 cm
Total length of rope not used
= 350 - 91
= 259 cm
1 cm = 0.01 m
259 cm = 2.59 m
Answer(s): (a) (7m + 7) cm; (b) 2.59 m