For the polynomial 6xy2-5x2y?+9x2 to be a trinomial with a degree of 3 after it has been fully simplified, what is the missing exponent of the y in the second term? 0 1 2 3

1

Step-by-step explanation:

For the degree to be 3, the total of exponents in any given term must be 3 or less. The term containing the question mark already has an exponent of 2 on the x-variable, so the exponent of the y-variable must be 1 or less. We assume the y-variable would not be written if its exponent were zero (as in the last term), so the exponent of y must be 1.