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Right now, the ratio of nonfiction to fiction is 9:18. If this is reduced, it is a ratio of 1:2, so there needs to be twice as many fiction books as nonfiction.
If we add 6 fiction books, we have 24 fiction books. We can now set up this equation:

Now we cross multiply

We can solve for x by dividing both sides by two, so:
x = 12. There will be 12 nonfiction books.
Answer:
C) f(n) = 5n-1
Step-by-step explanation:
71/2 can also be written as 15/2, so divide 15/2 by 3/4. When you divide fractions you flip the second fraction and multiply it, so now it would be 15/2 X 4/3, so you would get 60/6 which is 10!
a straight horizontal line on a speed-time graph means that speed is constant.