Simplify:

(−12x3y4 + 18x2y3 + 6x2y2) ÷ 6x2y2

(points : 5)
–2xy2 + 3y + 1

3y – 2xy

2x2y – 3y

–2xy2 + 1

super hard i don't get it i've got more questions on the ! consider !

Ok, so this is the same as saying (-12x3y4)/6x2y2+18x2y3/6x2y2+6x2y2/6x2y2.  You can separate them just like you could separate (4+8+2)/2 into 4/2+8/2+2/2.  They both equal 7.  Then you just have to cancel things out.  In the first one,  the -12 cancels with the 6 to give you -2, the 2 xs on the bottom cancel out 2xs on top and the 2ys on the bottom cancel out two on the top, leaving you with .  I think you can do the rest.  The correct answer is the first one you listed

The answer is: a = about 63.59ft2 for 15