Write "100 decreased by a number k" as an algebraic expression. 100/k

100 + k

100k

k – 100

100 – k

2 or B hope this helped!

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 *_*