What might a model for 3 x 3/5 look like? how many fifths would be shaded in all?

Best not to use "x" to denote multiplication.  "x" is usually a variable name in algebra.

3 times 3/5 comes out to 9/5, which is equivalent to 1 4/5.

You'd need to draw not one but two circles and divide each circle into 5 equal "slices."  Then you'd shade one circle completely and shade 4 of the 5 slices of the other circle.  9 fifths (9 slices) would be shaded in all.

4y - 6 + y^2 - 9 = y^2 + 4y - 15y^2 term terms- termstotal of 3 terms when simplified