PSLEPerry had 3.9 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 v.
- If v = 13, how much of the ribbon was not used to make the figure? Leave your answer in meters.
(a)
Total length of ribbon used
= v + v + v + (2v - 3) + (v + 18)
= v + v + v + 2v + v - 3 + 18
= (6 v + 15) cm
(b)
1 m = 100 cm
3.9 m = 390 cm
Total length of ribbon used if v = 13
= 6 v + 15
= 6(13) + 15
= 78 + 15
= 93 cm
Total length of ribbon not used
= 390 - 93
= 297 cm
1 cm = 0.01 m
297 cm = 2.97 m
Answer(s): (a) (6v + 15) cm; (b) 2.97 m