PSLESean had 2.3 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 g.
- If g = 15, how much of the ribbon was not used to make the figure? Leave your answer in meters.
(a)
Total length of ribbon used
= g + g + g + (2g - 7) + (g + 18)
= g + g + g + 2g + g - 7 + 18
= (6 g + 11) cm
(b)
1 m = 100 cm
2.3 m = 230 cm
Total length of ribbon used if g = 15
= 6 g + 11
= 6(15) + 11
= 90 + 11
= 101 cm
Total length of ribbon not used
= 230 - 101
= 129 cm
1 cm = 0.01 m
129 cm = 1.29 m
Answer(s): (a) (6g + 11) cm; (b) 1.29 m