Final answer:
The expressions equivalent to 36x + 24y are 6(6x+4y) and 12(3x+2y), as they are the only ones that expand to match the original expression exactly.
Step-by-step explanation:
To determine which expressions are equivalent to 36x + 24y, we need to factor or expand the given options and compare them to the original expression.
6x(6+4y) expands to 36x + 24xy, which is not equivalent to 36x + 24y because of the additional xy term.
6(6x+4y) expands to 36x + 24y, which is equivalent to the original expression.
12(36x+24y) expands to 432x + 288y, which is not equivalent to 36x + 24y because the coefficients are different.
12(3x+2y) expands to 36x + 24y, which is equivalent to the original expression.
4y(9x+6) expands to 36xy + 24y, which is not equivalent to 36x + 24y because of the additional xy term.
Therefore, the equivalent expressions to 36x + 24y are 6(6x+4y) and 12(3x+2y).