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alexandr1967 [171]
3 years ago
5

Is y = 3x² + 2 a function or not?

Mathematics
2 answers:
podryga [215]3 years ago
8 0
A function would have one Y value for every X value.
 If you replace X with any number and solve the equation there would be a different Y value every time, so this equation is a function.
Mama L [17]3 years ago
8 0
Yes, it's a quadratic function.
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Can three line segments with the given lengths form a right triangle?
musickatia [10]

Answer:

Yes

12, 35, 37

16, 30, 34

20, 21, 29

No

18, 24, 42

Step-by-step explanation:

Required

Determine which length form a right triangle

To do this, we make use of Pythagoras theorem where the square of the largest length = the sum of the squares of the other lengths

So:

(1) 12, 35, 37 --- Yes

37^2 = 35^2 + 12^2

1369 = 1225 + 144

1369 = 1369

(2) 16, 30, 34 --- Yes

34^2 = 16^2 + 30^2

1156 = 256 + 900

1156 = 1156

(3) 18, 24, 42 --- No

42^2 =18^2 + 24^2

1764 =324 + 576

1764 =900

1764 \ne 900

(4) 20, 21, 29 -- Yes

29^2 = 20^2 + 21^2

841= 400 + 441

841= 841

3 0
2 years ago
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pav-90 [236]

Answer:

The function is negative for all real values of x where

x < –3 and where x > 1.

Step-by-step explanation:

This quadratic function is downward parabola.

It's root are -3 and 1.

Quadratic is positive between -3 and 1.

And negative on R-(-3,1).

4 0
3 years ago
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Answer:

D

Step-by-step explanation:

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Step-by-step explanation:

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4 whole cups and 2/3 of a cup
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