PSLECarl had 3.5 m of ribbon. He used some of it to make the figure as shown.
- How much of the ribbon did Andy use to make the figure? Leave your answer in the simplest form in terms of n.
- If n = 24, how much of the ribbon was not used to make the figure? Leave your answer in meters.
(a)
Total length of ribbon used
= n + n + n + (2n - 10) + (n + 13)
= n + n + n + 2n + n - 10 + 13
= (6 n + 3) cm
(b)
1 m = 100 cm
3.5 m = 350 cm
Total length of ribbon used if n = 24
= 6 n + 3
= 6(24) + 3
= 144 + 3
= 147 cm
Total length of ribbon not used
= 350 - 147
= 203 cm
1 cm = 0.01 m
203 cm = 2.03 m
Answer(s): (a) (6n + 3) cm; (b) 2.03 m