Final answer:
The expression 18x + 9 - 2y - 2 has 4 coefficients. Hence, option A) is correct.
Step-by-step explanation:
The expression 18x + 9 - 2y - 2 has 4 coefficients.
The coefficients are the numbers that are multiplied by the variables. In this expression, the coefficients are 18, 9, -2, and -2.