What is the number zero classified as in math

Find the midpoint m of z1=(8+5i) and z2=(12+3i)

The pyramid below was dissected by a horizontal plane which shape describes the pyramid horizontal cross section

Select the correct answer from each drop-down menu. consider the following polynomials equations. 3x^2(x-1) and -3x^3+ 4x^2-2x+1 perform each operation and determine if the result is a polynomial. is the result of a + b a polynomial? yes or no is the result of a - b a polynomial? yes or no is the result of a · b a polynomial? yes or no