PSLEPaul had 3.3 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 j.
- If j = 14, how much of the ribbon was not used to make the figure? Leave your answer in meters.
(a)
Total length of ribbon used
= j + j + j + (2j - 5) + (j + 19)
= j + j + j + 2j + j - 5 + 19
= (6 j + 14) cm
(b)
1 m = 100 cm
3.3 m = 330 cm
Total length of ribbon used if j = 14
= 6 j + 14
= 6(14) + 14
= 84 + 14
= 98 cm
Total length of ribbon not used
= 330 - 98
= 232 cm
1 cm = 0.01 m
232 cm = 2.32 m
Answer(s): (a) (6j + 14) cm; (b) 2.32 m