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qaws [65]
3 years ago
10

Hi help me pls. its an exam the photo is bellow

Mathematics
2 answers:
Blizzard [7]3 years ago
4 0

The answer is A

I know this because Alvin is the one who has the greatest amount of points.

(In golf negative numbers are good and positive are bad)

Rainbow [258]3 years ago
4 0

Answer: D

Step-by-step explanation:

Alvin has a variation of 11

Doug has a variation of 19

Jacob has a variation of 10

Zach has a variation of 15

(Found these by taking the worst score - the best score)

Jacob, Alvin, Zach, Doug

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Ede4ka [16]
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3 years ago
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What is the range of the function f(x) = 3x2 + 6x – 8?
timama [110]

Answer:

Range is {y | y ≥ –11}


Step-by-step explanation:

This is quadratic equation.

<em>A quadratic equation's range can be found if we find the vertex.</em>

For quadratic equations that have a positive number in front of  x^{2} , it is upward opening and thus <u>all the numbers greater than or equal to the minimum value of vertex is the range.</u>


The formula for vertex of a parabola is:

Vertex =  (-\frac{b}{2a}, f(-\frac{b}{2a})

Where,

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  • b is the coefficient of x

From our equation given, a=3  and  b=6

Now, x coordinate of vertex is  x=-\frac{b}{2a}\\x=-\frac{6}{(2)(3)}\\x=-\frac{6}{6}\\x=-1

y coordinate of the vertex IS THE MINIMUM VALUE that we want. We get this by plugging in the x value [ x=-1 ] into the equation. So we have:

3(-1)^{2}+6(-1)-8\\=-11


Hence, the range would be all numbers greater than or equal to -11  

Third answer choice is the right one.


6 0
2 years ago
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Which is an equation of a direct proportion?<br> y=16x+6<br><br> y=6x<br><br> y=6x−6<br><br> y=6x
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y = 6x represents direct proportion with a constant of proportionality 6.  The other 2 choices are disqualified because of offset +6 or -6.

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Answer:

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Step-by-step explanation:

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c

Step-by-step explanation:

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