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Given is the number of science fiction books = 48
Let the number of mystery books be = x
Let the number of biographies be = y
Ratio of the number of mystery books to the number of science fiction books is 4:3 so
=
Ratio of the number of science fiction books to the number of biographies is 4:5 so
=
Hence there are 48 science fiction books, 64 mystery books and 60 biographies.
So total number of books are =
Answer:
Perimeter
Step-by-step explanation:
Let = width of the rectangle.
From the information "length of a rectangle is 5cm more than width", we can write:
Length =
- - - -
Perimeter (formula for the perimeter of a rectangle)
∴ The expression of the perimeter of the rectangle in terms of is
.
Hope this helps :)