PSLEHarry 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 q.
- If q = 25, how much of the streamer was not used to make the figure? Leave your answer in meters.
(a)
Total length of streamer used
= q + q + q + (3q - 10) + (q + 12)
= q + q + q + 3q + q - 10 + 12
= (7 q + 2) cm
(b)
1 m = 100 cm
3.4 m = 340 cm
Total length of streamer used if q = 25
= 7 q + 2
= 7(25) + 2
= 175 + 2
= 177 cm
Total length of streamer not used
= 340 - 177
= 163 cm
1 cm = 0.01 m
163 cm = 1.63 m
Answer(s): (a) (7q + 2) cm; (b) 1.63 m