Calculate the number in the middle of 8.6 and 21.3

Using the side-splitter theorem, daniel wrote a proportion for the segment formed by luke segment de. what is ec?

Solve the problem by making up an equation. a man could arrive on time for an appointment if he drove the car at 40 mph; however, since he left the house 15 minutes late, he drove the car at 50 mph and arrive 3 minutes early for the appointment. how far from his house was his appointment?

Quick graph the line for y+2=32(x+4) on the coordinate plane. does anyone know the cordinates will mark brainliest.