Which set of expressions are not equivalent? 3(3a) + a(3 a) and 3 a2 + 9 a 5(3 x) - 4(3 x) and 3 x
4(3 a) - 2(4 a) and 4 a2
4 x(x) + 312 x) and 4 x + 6 x

sum= when you add is how much the whole amount is

distance= when you use angles and it means how far it goes

step-by-step explanation:

i belive those are the ones that are under 90 degreese.

trapezoid

step-by-step explanation:

first i plotted all my points on a grid graph

i made sure all of them were in the correct quadrant

then i saw it was a trapezoid or a quadrilateral

-7/8

step-by-step explanation:

instead of subtracting you add the -6/8 and -1/8