The sum of a rational number and an irrational number

The figure above shows the lengths of thesides of a rectangle in cm. find the valuesof x and y and then the area of the rectangle.sides: top= 3x - yleft= 3y + 4bottom= 2x + yright= 2x - 3 use both methods, elimination and substitution, if possible.

What are the domain and range of the function? f(x) = -4 (sqrt)x

If f(x)= 3x+6 which of the following is the inverse of f(x)