How to know whether mean value theorem exists on interval

Order 1100000, 314000, 965000, 1890000, from least to greatest.

13 is the same as 1÷3. what is the exact quotient in decimal form of 1÷3?

What is the solution for the system of equations below? y=3/4x-12 and y=-4x-31. a: (-4,-15). b: (-4,-12). c: (4,-9). d: (4,-47)