PSLEGabriel had 3.5 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 = 23, 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 + (3f - 7) + (f + 20)
= f + f + f + 3f + f - 7 + 20
= (7 f + 13) cm
(b)
1 m = 100 cm
3.5 m = 350 cm
Total length of streamer used if f = 23
= 7 f + 13
= 7(23) + 13
= 161 + 13
= 174 cm
Total length of streamer not used
= 350 - 174
= 176 cm
1 cm = 0.01 m
176 cm = 1.76 m
Answer(s): (a) (7f + 13) cm; (b) 1.76 m