Answer:
The mixed number 5 1/4 is equal to the improper fraction 21/4.
(2x)2 > 3x2 is true the first two you can not have two x’s on the same side because where would you put them both when solving them the last one I’m not sure about
For this case, the first thing we must do is define variables.
We have then:
x: number of pens
y: number of pencils
We now write the system of inequations:

The solution to the system of inequations is given by the shaded region.
Note: see attached image.
-1+ 5 i think I dont know
That would be 725,000 because of the 8 in the hundreds place