What is the perimeter of the rectangle?

One line passes through (-7,-4) and (5,4) . another line passes through the point (-4,6) and (6,-9)

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.

Charlie tosses five coins.what is the probability that all five coins will land tails up.