How would i write
doubling the quantity of a number decreased by six is less than negative thirty-six

Quantity of a number is represented by x
doubling x means 2 times x or 2x
decreased by 6 means minus 6 or 2x-6
is less than means <
negative 36 means -36

2x-6<-36
add 6
2x<-30
divide 2
x<15

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 *_*

the answer would be c ≈ 18.852*3.14= 6.286.28*3=18.85