Answer:
y = 2x + 6 and 2y-4x=12 are the same line, so have infinitely many solutions.
Step-by-step explanation:
2y - 4x = 12
This is the same as y = 2x + 6
This is a composite. Another way to write them is f(g(x)). Take the function g(x) and stick it in for x in f(x). Like this:

. But we aren't done cuz there's some simplifying there to do.

and canceling out the 3's we get just a simple x as our answer. The choice is the last one above as your answer.
The answer is D. A cube with side lengths of 2 feet has a volume of 8 cubic feet.
The distance between (5, 2) and (2,-2) is 5 units
The "mean" is the "average" you're used to, where you add up all the numbers and then divide by the number of numbers.