Acar travels 4 mph slower than a motercycle. let x represent the speed of the motorcycle. a. write an expression for the speed of the car. b. write an expression for the time it takes the motorcycle to travel 50 mi. c. write an expression for the time it takes the car to travel 145 mi.

You forgot to mention at the end od the sentence " at the same time"
a. Vcar= (x-4)  
b. t=50mi/x
c. t=145mi/(x-4)

“exterior angles of triangles. an exterior (or external) angle is the angle between one side of a triangle and the extension of an adjacent side. try this drag the orange dots on any vertex to reshape the triangle.” look to get to the answer i explained what it means and other things i hope it you .