PLEASE HELP I WILL MARK BRAINLYEST. 50 POINTS PLEASE. I WILL REPORT ABSURD ANSWERS. MY QUESTIONS ARE THE IMAGES BELOW

Mathematics

1 answer:

Arturiano [62]3 years ago

3 0

Answer:

1, 3, 4- yes, 2- no

Step-by-step explanation:

Yes, it is function
x-values are unique and each has one corresponding y-value

No, it is not a function
x-values are repeated with different y-value: (13, 4) and (13, -4)

Yes, it is a function
If you put a vertical line, there will always be one intersection with the graph

Yes, it is a function
This will produce a parabola which is a graph of a normal function with unique x-values and corresponding y-values

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The sum of three numbers is 3. if the second number is subtracted from the sum of the first and third numbers, the result is 9.

Margaret [11]

Let the three numbers be x, y, and z.

If the sum of the three numbers is 3, then x+y+z=3

If subtracting the second number from the sum of the first and third numbers gives 9, then x+z-y=9

If subtracting the third number from the sum of the first and second numbers gives -5, then x+y-z=-5

This forms the system of equations:
[1] x+y+z=3
[2] x-y+z=9
[3] x+y-z=-5

First, to find y, let's take do [1]-[2]:
x+y+z=3
-x+y-z=-9
2y=-6
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Then, to find z, let's do [1]-[3]:
x+y+z=3
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2z=8
z=4

Now that you have y and z, plug them into [1] to find x:
x+y+z=3
x-3+4=3
x=2

So the three numbers are 2,-3, and 4.

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3 years ago

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Romashka-Z-Leto [24]

Answer:

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Step-by-step explanation:

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