6x-1 because you combine like terms 4x+2x=6x and then -4+3=-1
You can write every speed as the ratio between the space and time, so in this case you have

Answer:
1/4 1/8 1/10
Step-by-step explanation:
410/20 * 75 = 1537.5 miles.
The intersection of the steps is just a fancy way of asking wi\hich numbers are in both equations so lets look and see :)
The 1st = 0...1...5...7...8
The 2nd =0........5...7........9
Answer = D {0, 5, 7}
Hope this helps have any questions let me know :)