PSLECarl had 2.9 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 = 12, 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 + (3j - 4) + (j + 15)
= j + j + j + 3j + j - 4 + 15
= (7 j + 11) cm
(b)
1 m = 100 cm
2.9 m = 290 cm
Total length of streamer used if j = 12
= 7 j + 11
= 7(12) + 11
= 84 + 11
= 95 cm
Total length of streamer not used
= 290 - 95
= 195 cm
1 cm = 0.01 m
195 cm = 1.95 m
Answer(s): (a) (7j + 11) cm; (b) 1.95 m