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alisha [4.7K]
3 years ago
6

Which relation is a function?

Mathematics
1 answer:
ahrayia [7]3 years ago
3 0
A relation is a function if & only if for each value of x we have (at the most) one & only one value of y.
In short if we have a repeat value of x that correspond to 2 different values of y then it's not a function but a relation instead

Let's take the 1st example:
    x     I   y
---------I-------
1        I  2
3        I  2
3        I  3
4        I  2
We notice that there are 2 SAME VALUE of x (that is 3) that have various value of y, Hence this is not a function. Mind you this concerns x ONLY.
In short a function doesn't allow a repeat of same x.
Follow this methodology & you will find the other problems


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is this quadrilateral a parallelogram?If yes, state the definition or theorem that justifies your answer.​
Xelga [282]

Answer:

Yes.

Step-by-step explanation:

Yes.   Because opposite angles are congruent.

4 0
3 years ago
Read 2 more answers
One number is 6 more than another. Twice the larger number is 5 times the smaller.
tresset_1 [31]

Answer:

The smaller number is 4

Step-by-step explanation:

Larger number = x

Smaller number = y

Write 2 equations

y + 6 = x

2x = 5y

Substitute x in the first equation to the second equation

2(y + 6) = 5y

Multiply 2(y + 6)

2y + 12 = 5y

Subtract 2y from both sides of the equation

12 = 3y

Divide both sides of the equation by 3

y = 4

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Hope this helps :)

3 0
3 years ago
LCM for 2 and 13 plz help me out
Andrei [34K]

[ Answer ]

\boxed{\bold{LCM \ = \ 26}}

[ Explanation ]

  • Find LCM For 2 & 13

-------------------------------------

LCM - The smallest number that two or more numbers can evenly fit into

  • LCM - What We Know
  • 2 & 13 Must Evenly Fit
  • Must Be Smallest Number They Both Fit Into
  • Multiple Of Two Or More Numbers

The Smallest Number That Both 2 & 13 Evenly Fit Into Is 26

26 ÷ 2 = 13

26 ÷ 13 = 2

\boxed{\bold{[] \ Eclipsed \ []}}

5 0
3 years ago
If z=3 and z*y=12 what does y+5 equal
mart [117]
Z = 3                                              (This equation is a given)

z(y) = 12                                       ( This equation is also given) 

3y = 12                                         (as z = 3, plug 3 into z)

3y/3 = 12/3                                   (isolate the y by dividing 3 to both sides) 
                                                  * you divide 3 to both sides because of the equal                                                             sign. What you do to one side you do to the                                                                    other
y = 4                                             (answer for y)

y + 5                                             (what you are solving for)

(4) + 5 = 9                                    (As y = 4, plug in 4 for y in this equation)

y + 5 = 9                                       (4 + 5 =  9, or addition property)

9 is your answer           

hope this helps
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