Find BD , given that line AB is the angle bisector of < CAD​

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.

Can someone me with this graph problem by the way i need to know the answers by today since this assignment is due ! !

If f(x) = 3x-2 and g(x) =2x+1 find (f-g)(x)