PSLEMichael had 2.6 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 y.
- If y = 19, how much of the streamer was not used to make the figure? Leave your answer in meters.
(a)
Total length of streamer used
= y + y + y + (3y - 5) + (y + 18)
= y + y + y + 3y + y - 5 + 18
= (7 y + 13) cm
(b)
1 m = 100 cm
2.6 m = 260 cm
Total length of streamer used if y = 19
= 7 y + 13
= 7(19) + 13
= 133 + 13
= 146 cm
Total length of streamer not used
= 260 - 146
= 114 cm
1 cm = 0.01 m
114 cm = 1.14 m
Answer(s): (a) (7y + 13) cm; (b) 1.14 m