PSLECody had 3.8 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 = 28, 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 - 8) + (e + 18)
= e + e + e + 2e + e - 8 + 18
= (6 e + 10) cm
(b)
1 m = 100 cm
3.8 m = 380 cm
Total length of wire used if e = 28
= 6 e + 10
= 6(28) + 10
= 168 + 10
= 178 cm
Total length of wire not used
= 380 - 178
= 202 cm
1 cm = 0.01 m
202 cm = 2.02 m
Answer(s): (a) (6e + 10) cm; (b) 2.02 m