Which of the following is a monomial? a. 20x^9 b. 9/x c. 11x – 9 d. 20x^9 – 7x

Mono means one, and so the equation will have one term with a power where n is a positive integer. A polynomial has many terms.

A. is a single term. this is the answer.

B. has a negative power, which means it is not considered as a monomial.

C. this has two terms. it is wrong

D. this has two terms. it is wrong as well.

A is the answer.

A. 20x^9

Step-by-step explanation:

A P E X

The sine  = 1 cosecant.sine = opposite side / hypotenuse and cosecant = hypotenuse / opposite.