Use the discriminant to describe the roots of each equation. then select the best description. x^2 - 4x + 4 = 0

a) double root
b) real and rational roots
c) real and irrational roots
d) non real roots

180

step-by-step explanation:

12-2=10

20-2=18

18x10=180

answer:   35 % is the probability of a late departure or an early arrival.

step-by-step explanation:

let l represents the late departure and e represents the early departure.

then, according to the question,

p(l) = 12 %,   p(e) = 27 % and = 4 %

and, we have to find out,

but, we know that,

which is the required equation that will use to find the probability of a late departure or an early departure.

therefore,   the probability of a late departure or an early arrival =   35 %