2 years ago

Which of these graphs represents a function?

Mathematics

2 answers:

Likurg_2 [28]2 years ago

7 0

Do you have any graphs because that would be more clear

alexira [117]2 years ago

6 0

Answer:

if it is question 7 in i-ready than the answer is

the one with THE LINE POINTING SIDEWAYS

just ONE line

Step-by-step explanation:

I know because i got it right

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Find+the+positive+value+for+α+if+the+radius+of+the+circle+3x^2+3y-6αx+12y-3α=0+is+4

Alik [6]

Answer:

$\alpha=3$

Step-by-step explanation:

<u>Equation of a Circle</u>

A circle of radius r and centered on the point (h,k) can be expressed by the equation

$(x-h)^2+(y-k)^2=r^2$

We are given the equation of a circle as

$3x^2+3y^2-6\alpha x+12y-3\alpha=0$

Note we have corrected it by adding the square to the y. Simplify by 3

$x^2+y^2-2\alpha x+4y-\alpha=0$

Complete squares and rearrange:

$x^2-2\alpha x+y^2+4y=\alpha$

$x^2-2\alpha x+\alpha^2+y^2+4y+4=\alpha+\alpha^2+4$

$(x-\alpha)^2+(y+2)^2=r^2$

We can see that, if r=4, then

$\alpha+\alpha^2+4=16$

Or, equivalently

$\alpha^2+\alpha-12=0$

There are two solutions for $\alpha$ :

$\alpha=-4,\ \alpha=3$

Keeping the positive solution, as required:

$\boxed{\alpha=3}$

8 0

2 years ago

A map has a scale of 3 in. = 16 mi. If you measured the distance between two cities to be 23 in. on the map, how many miles woul

Scrat [10]

Answer:

122.667

Step-by-step explanation:

23/3=7.667

7.667*16=122.667

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2 years ago

F(a)=a^4+3a^3-17a^2+2a-7 at a=3

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Answer:

Step-by-step explanation:

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PrimeAnswer:

Step-by-step explanation:

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The answer is <BAR ≅<CAR :)

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2 years ago

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