55mph.
you can solve it using the equation distance=speed x time
your total distance is 714, and you have 2 trains, one traveling some speed, x, and one traveling x+8, both traveling for 7 hours.
your equation would look like this

and you can then solve for x, which would be 47. this is the speed of the slower train, but 47+8=55 with give you the speed of the faster train.
Answer: The correct answer is 3
Step-by-step explanation:
4³ = 64
The way to check your work is to multiply 4 x 4 x 4:
16 x 4 = 64
You add eight three times (8+8+8=24)
Answer:
12
Step-by-step explanation:
2/4 = 1/2
1/2 - 2/7 LCD of 2 and 7 is 14
7/14 - 4/14 = 3/14
thats the answer