What object has a definite beginning and a definite ending?
1 answer:
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Answer:
of the books in the book store are mystery fiction books.
Step-by-step explanation:
Let x represent all the books in the books store.
Then, the fraction of books that are fiction books is
We have that; of the fiction books are mystery books.
The fraction of the books at the bookstore that are mystery fiction books is .
Therefore of the books in the bookstore are mystery fiction books.
Answer:
x = 15
Step-by-step explanation:
Assuming 3x and x-60 are in degrees, you can use:
cos(a) = sin(a+90)
To rewrite the equation as:
sin(3x) = sin(x-60+90)
sin(3x) = sin(x+30)
3x = x+30
2x = 30
x = 15
But, solving 3x = x+30 which simplifies to x=15 is not the only solution to this equation, as you can see in below picture. Finding all solutions is a bit more work, but maybe that is not required in your case.
