If the coefficient of the expression axn is positive and the exponent is negative, the expression will be a polynomial.

a. true
b. false

For this case we have the following expression:

Where,

a: coefficient of expression

n: exponent of the expression:

The expression is a polynomial if it meets the following conditions:

1) a ∈ (-∞, ∞)

2) n>0

We observe that the second condition is not fulfilled.

Therefore, the expression is not a polynomial.

B. False: If the coefficient of the expression ax^n is positive and the exponent is negative, the expression will be a polynomial.

9 sandwiches per hour

step-by-step explanation:

when we have a rate, we want a 1 in the denominator

27/3 = 9

27 sandwiches/ 3 hours = 9 sandwiches/hour