Yes - 1/4 is 25%. 4/8 is 1/2 which is 50%
Answer ≈ 4 and a half billion
If we assume your letters range from A to Z and your digits from 0 to 9, you have 26 possibilities per letter and 10 per digit. This gives you 26^4*10^4 which is roughly 4 billion and a half.
15*3=45
so the 45 pounds per hour would be the speed
Simply rearrange the terms and simplify.
Subtracting 4x from both sides, we have:
-11y=-4x-6
Dividing by -11, we have:

This is in the proper form, so this is our final equation.