
<span>his average speed is </span>12 2/3 kilometers per hour
Answer:1.1428 is the answer
Step-by-step explanation: Distribute using (Pemdas) 2nd find x alone and divide by 4
Form an equation using the information given
-4x - 6x = -20
simplify
-10x = -20
then solve by dividing by -10
x = -20/-10
x = 2