Final answer:
The polynomial is in standard form because the exponents are in descending order and it cannot be further simplified.
Step-by-step explanation:
The statement that best describes the polynomial -24x^7 -12x^2 -9x=6 is: It is in standard form because the exponents are in order from highest to lowest. A polynomial is in standard form when the terms are arranged with their exponents in descending order, which is the case here. Also, there are no like terms to combine, which means the polynomial cannot be further simplified and the constant term (in this case 6) does not need to be the first term for the polynomial to be in standard form.