What inscribed polygon is being constructed? Explain how you know. PLEASE HURRY

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.

Can some one me, i’ve been asking for so long

Hello i need some with trigonometric substitutions. [tex]\int\limits^a_b {x} \, dx[/tex]