Answer: yes she is correct
Step-by-step explanation: "An integer (from the Latin integer meaning "whole") is a number that can be written without a fractional component."
A rational number is any number that can be written in a/b form (like a fraction). So it just can't be a repeating decimal like how pie goes on forever. So let's see. 8.05 could work. Since you could write that as 8.05 over 1 (8.05/1)
Givens
Andrea: K
Me: 5k - 4
Sum
k + 5k - 4 = 14
Solve
6k - 4 = 14 Add 4 to both side.
6k - 4 + 4 = 14 + 4
6K = 18 Divide by 6
k = 18/6
k = 3
A polynomial of degree n is an expression of the form:

where a, b, c, ...d, e, f are Real numbers, and any of them can be = 0, except a.
and the degrees, n, n-1, .... are all non-negative integers: {0, 1, 2, 3 ...}
Among our choices,
the first one,

,
does not fit the polynomial definition, so the expression is not a polynomial.
the second one, is a fifth degree polynomial
the third one,

is a fourth degree polynomial.
the fourth one,

is not a polynomial
Answer: <span>9x4 – x3 – x/5</span>