PSLEMichael had 3.7 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 g.
- If g = 19, how much of the streamer was not used to make the figure? Leave your answer in meters.
(a)
Total length of streamer used
= g + g + g + (3g - 10) + (g + 19)
= g + g + g + 3g + g - 10 + 19
= (7 g + 9) cm
(b)
1 m = 100 cm
3.7 m = 370 cm
Total length of streamer used if g = 19
= 7 g + 9
= 7(19) + 9
= 133 + 9
= 142 cm
Total length of streamer not used
= 370 - 142
= 228 cm
1 cm = 0.01 m
228 cm = 2.28 m
Answer(s): (a) (7g + 9) cm; (b) 2.28 m