Apiece of wire 7 m long is cut into two pieces. one piece is bent into a square and the other is bent into an equilateral triangle.

how much wire should be used for the square in order to minimize the total area?

Lizette is training for a marathon. at 7: 00 she left her house and ran until 8: 30, then she walked until 11: 30. she covered a total distance of 18 miles. her running speed was six miles per hour faster than her walking speed. find her running and walking speeds in miles per hour.