27. There are (3x + 5y) shelves in a library and in each shelf there are
(5x+ 3y) books. How many books are there in the library.
28. 408 is ____% more than 340.
pls can anyone solve this question for me
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Step-by-step explanation:
27.
Number of books in 1 shelf = ( 5x + 3y )
Number of books in ( 3x + 5y) shelves =
= ( 5x + 3y) ( 3x + 5y )
= 15x^2 + 25xy + 9xy + 15y^2
= 15x^2 + 34xy + 15y^2 books
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