PSLEPeter had 2.9 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 q.
- If q = 16, how much of the ribbon was not used to make the figure? Leave your answer in meters.
(a)
Total length of ribbon used
= q + q + q + (3q - 9) + (q + 15)
= q + q + q + 3q + q - 9 + 15
= (7 q + 6) cm
(b)
1 m = 100 cm
2.9 m = 290 cm
Total length of ribbon used if q = 16
= 7 q + 6
= 7(16) + 6
= 112 + 6
= 118 cm
Total length of ribbon not used
= 290 - 118
= 172 cm
1 cm = 0.01 m
172 cm = 1.72 m
Answer(s): (a) (7q + 6) cm; (b) 1.72 m