What is 1+1

And what is it’s answer

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.

Will mark name all segments skew to bc

In the diagram, ab is tangent to c, ab = 4 inches, and ad = 2 inches. find the radius of the circle.