1) which polynomial is written in standard form for the polynomial below -9x+x^3-x^4+3?

a) -9x+x^3-x^4+3

b) 9x+x^3+x^4+3

c) x^4+x^3+9x+3

d) -x^4+x^3-9x+3

2) what is the degree of the polynomial
3pq^4-2p^2q+q^3?

a) 1

b) 2

c) 4

d) 5

3) which expression is not a polynomial?

a) z+1

b) 2x^4-y

c) 6+w

d) y^2-^3√y+4

See below.

Step-by-step explanation:

1).  Standard form is where the exponents are arranged in descending order.

It's D.   -x^4+x^3-9x+3.

2)

D.  Degree 5 because the term with the highest degrees is 3pq^4.

3)

Its D,  because of the radical √y.

solution:

→c= a b , that is product of a and b is possible only when when a is m × n matrix and b is n × p matrix.

that is, number of columns of a= number of rows of b.

so, size of matrix , c= a b is , if a = (m × n)matrix

b= (n × p)matrix

then a b = [ (m × n)matrix] ×[   (n × p)matrix ]

→→c= a b= [m × p ] matrix

→→size of product a b will be equal to = number of rows of a × number of columns of b