PSLEPeter 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 z.
- If z = 13, how much of the streamer was not used to make the figure? Leave your answer in meters.
(a)
Total length of streamer used
= z + z + z + (3z - 5) + (z + 15)
= z + z + z + 3z + z - 5 + 15
= (7 z + 10) cm
(b)
1 m = 100 cm
3.4 m = 340 cm
Total length of streamer used if z = 13
= 7 z + 10
= 7(13) + 10
= 91 + 10
= 101 cm
Total length of streamer not used
= 340 - 101
= 239 cm
1 cm = 0.01 m
239 cm = 2.39 m
Answer(s): (a) (7z + 10) cm; (b) 2.39 m