Which measure describes how all of the values of a data set vary with a single number?? 1)mean 2)median 3)mode 4)range

Answer to your question: a. the fundamental theorem of algebra tells you that the equation will have two complex roots since the degree of the polynomial is 2. the roots are ​ x=1±i7√2 .number of roots=degree of polynomialhere, degree of polynomial is 2 so number of roots will be 2.hope it *_*

D. triangular pyramid