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kramer
3 years ago
7

Which set of ordered pairs represents a function?

Mathematics
2 answers:
mel-nik [20]3 years ago
6 0
The one that doesn't have an "x" repeated, that is an X-REPEAT
notice, the pair is just an x,y  pair.. .so if the "x" is repeated, is NOT a function

let's see

\bf \{(2, -2), (\boxed{1}, 5), (-2, 2), (\boxed{1}, -3), (8, -1)\}\impliedby \textit{has an "x" rep}eated\\\\
\{(3, -1), (7, 1), (-6, -1), (9, 1), (2, -1)\}\\\\
\{(6, 8), (5, 2), (\boxed{-2}, -5), (1, -3), (\boxed{-2}, 9)\}\impliedby \textit{has an "x" rep}eated\\\\
\{(\boxed{-3}, 1), (6, 3), (\boxed{-3}, 2), (\boxed{-3}, -3), (1, -1)\}\impliedby \textit{an "x" rep}eated
Agata [3.3K]3 years ago
5 0

Answer:

The second set of ordered pairs :

{(3,-1),(7,1),(-6,-1),(9,1),(2,-1)}

Step-by-step explanation:

A function in IR2 (coordinate plane) assigns to a value of ''x'' an unique value of ''y''.

For example, the function f(x)=x+3.

When x=2 ⇒ f(2)=2+3=5

Therefore, the ordered pair (2,5) belongs to the function.

For each value of ''x'' we will have an unique value of ''y''.

For example, the ordered pairs (4,5) and (4,8) don't belong to any function because the value ''4'' can't be assign to ''5'' and ''8'' at the same time.

On the other hand, we can have the same value of ''y'' assigns to different values of ''x''. For example , (3,0) and (7,0) are correct ordered pairs for the function y=0.

In order to answer the question, we will discard the sets in which two or more ordered pairs have the same value of ''x'' assign to a different value of ''y''.

Examining the sets we find that the first set has the ordered pairs (1,5) and (1,-3) so it is not a valid set of ordered pairs which represents a function.

The second set is correct.

The third set has (-2,-5) and (-2,9) so it doesn't represent a function.

We will have the same problem in the fourth set with the ordered pairs (-3,1) , (-3,2) and (-3,-3).

The only correct set is the second one.

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PSYCHO15rus [73]
It is equivalent to 16 cm
4 0
2 years ago
PLEASE HELP I WILL BRAINLIST
PSYCHO15rus [73]

Answer:

8

Step-by-step explanation:

Since they intersect you can just solve for x and y

since y=-4x and y=x^2+2x+8, you can set -4x=x^2+2x+8

add 4x to both sides to make 0=x^2+6x+8

and factor out (x+4)(x+2)

so the solutions for x are -4 and -2

then insert the two values for x into the first equation

so y=-4(-4) and y=-4(-2)

so y=16 and y=8 when x=-4 and x=-2

so the smallest value for y in both equations is 8

Please give brainliest :)

3 0
3 years ago
#7: Five containers, each weighing the same amount, were placed on a 30-pound
Ede4ka [16]

Answer:

Option (B)

Step-by-step explanation:

Let the weight of one container = x pounds

Therefore, weight of 5 containers = 5x pounds

Weight of the platform = 30 pounds

Total weight of the platform and containers = (5x + 30) pounds

If the maximum weight that can be lifted by the cable = 780 pounds

Inequality representing this situation will be,

(5x + 30) < 780

5x < 780 - 30

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Therefore, Option (B) is the answer.

6 0
3 years ago
56,00 rounded to 1,000
Dmitry [639]
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6 0
3 years ago
Jan,Mya, and sara ran a total of 64 miles last week. Jan and Mya ran the same number of miles. Sarah ran 8 less miles than Maya.
BaLLatris [955]
<span> Jan, Maya and Sarah run a total of 64 miles per week
How many miles did Sarah run if she ran less than 8 miles compare to Maya and Jan
Jan and Maya = x
Sarah = x
Total miles = 64

=> 64 = x + x + x-8
=> 64 = 3x – 8
=> 72 = 3x
=> x = 24
Since Jan and Maya ran the same miles, they ran 24 miles each
Since Sarah is 8 less than Maya’s and Jan’s ran each
=> x – 8
=> 24 -8
=> 16
Sarah ran 16 miles in a week.

</span>



7 0
3 years ago
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