Which expression is not a polynomial?

A) 4x^-1 + 5x - 2

B) x - 5

C) 1/3x

D) x^3 + 4x + 3

(Also can you explain what a polynomial is?)

Cassidy has 10 feet of string. She uses 5/8 feet of string for each bracelet she makes. Does she have enough string to make 15 bracelets? Estimate 5/8 multiplied by 15 to solve the problem.

A box can had a maximum of 60 comic books. If comic books are bundled together in groups of 8, write and solve an inequality to find the maximum number of bundles of comic books that the box can carry.

If f (x) = - 3x-2, what is f (-5)

4x + 1 = 13 what is the answer

Hey computer is on sale for $1600 which is a 20% discount of the regular price what is the regular price

Find the greatest common factor of 8a3b2 and 12ab4

What do s the constant proportionality in the equation y = 5x

You roll a six-sided die. Find the probability of each of the following scenarios. (a) Rolling a 4 or a number greater than 3 (b) Rolling a number less than 5 or an even number (c) Rolling a 4 or an odd number

The perfect squares between 21 and 52

I need to make this expression true by using grouping symbols. 2x2+3^2 - 4+3x5