PSLENeave had 3.4 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 t.
- If t = 23, how much of the ribbon was not used to make the figure? Leave your answer in meters.
(a)
Total length of ribbon used
= t + t + t + (2t - 4) + (t + 15)
= t + t + t + 2t + t - 4 + 15
= (6 t + 11) cm
(b)
1 m = 100 cm
3.4 m = 340 cm
Total length of ribbon used if t = 23
= 6 t + 11
= 6(23) + 11
= 138 + 11
= 149 cm
Total length of ribbon not used
= 340 - 149
= 191 cm
1 cm = 0.01 m
191 cm = 1.91 m
Answer(s): (a) (6t + 11) cm; (b) 1.91 m