amiobidova
27.07.2020 •
Mathematics
-2 1/4÷(-3 1/3)=? Solve into a simplified proper or improper fraction.
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Ответ:
The answer is
3/4Step-by-step explanation:
-2 1/4÷(-3 1/3)
First convert the mixed number to an improper fraction
That's
And
So we have
Simplify
Change the division sign to multiplication sign and reverse the second number
That's
Simplify
We have the final answer as
Hope this helps you
Ответ:
Given:
The set of ordered pairs.
To find:
Which set of ordered pairs represents a function?
Solution:
A set of ordered pairs represents a function, if there exist unique output value for each input value.
In option A,
{(2, 9), (5, 9), (1, -6), (-5, 5)}
It is a function because all input has unique outputs.
In option B,
{(6, 6), (6, 8), (-8, -7), (-3, -8)}
For x=6, there exist two outputs y=6 and y=8. So, it is not a function.
In option C,
{(1, 8), (9, -3), (7, -4), (7, -6)}
For x=7, there exist two outputs y=-4 and y=-6. So, it is not a function.
In option D,
{(-5, -1), (-3, -7), (-5, 3), (-7, -4)}
For x=-5, there exist two outputs y=-1 and y=3. So, it is not a function.
Therefore, the correct option is A.