PSLEFlynn had 3.7 m of wire. He used some of it to make the figure as shown.
- How much of the wire did Andy use to make the figure? Leave your answer in the simplest form in terms of e.
- If e = 22, how much of the wire was not used to make the figure? Leave your answer in meters.
(a)
Total length of wire used
= e + e + e + (2e - 7) + (e + 16)
= e + e + e + 2e + e - 7 + 16
= (6 e + 9) cm
(b)
1 m = 100 cm
3.7 m = 370 cm
Total length of wire used if e = 22
= 6 e + 9
= 6(22) + 9
= 132 + 9
= 141 cm
Total length of wire not used
= 370 - 141
= 229 cm
1 cm = 0.01 m
229 cm = 2.29 m
Answer(s): (a) (6e + 9) cm; (b) 2.29 m