Show me how you got the answer. in advance.

Write and solve an equation of ratios:  6 books/11 people = x/13543 people.

Then 6 = 11x/13543, and x = 13543/11, or 6*13543=11x, and x = 7307 books.

The library already has 3500 books.  Thus,to achieve this goal, the library would have to acquire (7307-3500) more books:  3887 books.

i = 2 / - 5

step-by-step explanation:

evaluation of ( 2 - 4 ) ( p + q ) when p = 2 and q = 5 i, by putting values of p and q,                                                                    

0 = ( 2 - 4 ) ( p + q )0 = ( 2 - 4 ) ( 2 + 5 i ),   by multiplying these0 = ( 4 + 10 i - 8 - 20 i )0 = 4 - 8 + 10 i - 20 i0 = - 4 -10 i   0 = 2 ( - 2 - 5 i )0 / 2 = - 2 - 5 i- 2 - 5 i = 0- 5 i = 2i = 2 / - 5

step-by-step explanation:

12 minutes