PSLEBryan 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 x.
- If x = 27, how much of the streamer was not used to make the figure? Leave your answer in meters.
(a)
Total length of streamer used
= x + x + x + (3x - 9) + (x + 12)
= x + x + x + 3x + x - 9 + 12
= (7 x + 3) cm
(b)
1 m = 100 cm
3.4 m = 340 cm
Total length of streamer used if x = 27
= 7 x + 3
= 7(27) + 3
= 189 + 3
= 192 cm
Total length of streamer not used
= 340 - 192
= 148 cm
1 cm = 0.01 m
148 cm = 1.48 m
Answer(s): (a) (7x + 3) cm; (b) 1.48 m