Reference books are for use in the library. there are 16 bookshelves for the reference books. after use, they need to be returned to a special collection box for shelving. if 128 reference books are in use and 84 reference books are in the collection box, how many reference books are on the shelf?

13.25

Step-by-step explanation:

128+84=212

212/16=13.25

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)

hiking down a winding trail.

step-by-step explanation: