PSLESeth had 3.4 m of streamer. He used some of it to make the figure as shown.
- How much of the streamer 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 streamer was not used to make the figure? Leave your answer in meters.
(a)
Total length of streamer used
= j + j + j + (2j - 4) + (j + 15)
= j + j + j + 2j + j - 4 + 15
= (6 j + 11) cm
(b)
1 m = 100 cm
3.4 m = 340 cm
Total length of streamer used if j = 14
= 6 j + 11
= 6(14) + 11
= 84 + 11
= 95 cm
Total length of streamer not used
= 340 - 95
= 245 cm
1 cm = 0.01 m
245 cm = 2.45 m
Answer(s): (a) (6j + 11) cm; (b) 2.45 m