PSLEJohn had 2.2 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 p.
- If p = 14, how much of the streamer was not used to make the figure? Leave your answer in meters.
(a)
Total length of streamer used
= p + p + p + (3p - 4) + (p + 16)
= p + p + p + 3p + p - 4 + 16
= (7 p + 12) cm
(b)
1 m = 100 cm
2.2 m = 220 cm
Total length of streamer used if p = 14
= 7 p + 12
= 7(14) + 12
= 98 + 12
= 110 cm
Total length of streamer not used
= 220 - 110
= 110 cm
1 cm = 0.01 m
110 cm = 1.1 m
Answer(s): (a) (7p + 12) cm; (b) 1.1 m