PSLEDylan had 3.2 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 s.
- If s = 29, how much of the ribbon was not used to make the figure? Leave your answer in meters.
(a)
Total length of ribbon used
= s + s + s + (3s - 10) + (s + 16)
= s + s + s + 3s + s - 10 + 16
= (7 s + 6) cm
(b)
1 m = 100 cm
3.2 m = 320 cm
Total length of ribbon used if s = 29
= 7 s + 6
= 7(29) + 6
= 203 + 6
= 209 cm
Total length of ribbon not used
= 320 - 209
= 111 cm
1 cm = 0.01 m
111 cm = 1.11 m
Answer(s): (a) (7s + 6) cm; (b) 1.11 m