PSLEOwen had 2.1 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 f.
- If f = 11, how much of the streamer was not used to make the figure? Leave your answer in meters.
(a)
Total length of streamer used
= f + f + f + (2f - 5) + (f + 17)
= f + f + f + 2f + f - 5 + 17
= (6 f + 12) cm
(b)
1 m = 100 cm
2.1 m = 210 cm
Total length of streamer used if f = 11
= 6 f + 12
= 6(11) + 12
= 66 + 12
= 78 cm
Total length of streamer not used
= 210 - 78
= 132 cm
1 cm = 0.01 m
132 cm = 1.32 m
Answer(s): (a) (6f + 12) cm; (b) 1.32 m