Darius reads 2/10 of his book in 3 days. He says that if he reads the rest of the book at the same speed, it should take him 15 more days to finish the book. Is Darius correct?

Darius is correct

Step-by-step explanation:

Darius reads of his book in 3 days

In 1 day, he reads of the book.

Therefore in 15 days,  He reads

which is the whole of the book.

x =±sqrt(1/3)

step-by-step explanation:

x+4/6x=1/x

multiply each side by 6x to get rid of the fractions

6x*(x+4/6x)=1/x*6x

distribute

6x^2 +4 = 6

subtract 4 from each side

6x^2 +4-4 = 6-4

6x^2 =2

divide by 6

6x^2/6 = 2/6

x^2 = 1/3

take the square root of each side

sqrt(x^2) = ±sqrt(1/3)

x =±sqrt(1/3)