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2 years ago

Wich of the following functions maps 3 to -5?

Mathematics

1 answer:

kolezko [41]2 years ago

5 0

Answer:

Step-by-step explanation:

Consider all options and find f(3):

Then

Not -5, so this option is false.

Then

This option is true.

Then

Not -5, so this option is false.

Then

Not -5, so this option is false.

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3 years ago

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mamaluj [8]

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Step-by-step explanation:

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1 year ago

Evaluate the function.<br> f(x) = 2x2<br> Find f(-3)<br><br> Can anybody answer this?

o-na [289]

Answer:

Step-by-step explanation:

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6 0

3 years ago

Read 2 more answers

Which equation represents the circle described? (in picture)

Sedaia [141]

You are right. In circle equation we have =r² so the correct answer will be C od D. But we have to calculate the center of a circle.

$x^2+y^2-8x-6y+24=0\quad|-24\\\\(x^2-8x)+(y^2-6y)=-24$

Complete the square:

$x^2-8x+a^2\implies a=\dfrac{8x}{2x}=4\implies x^2-8x+4^2\\\\\\y^2-6y+b^2\implies b=\dfrac{6y}{2y}=3\implies y^2-6y+3^2$

And we have:

$(x^2-8x)+(y^2-6y)=-24\\\\(x^2-8x+4^2)-4^2+(y^2-6y+3^2)-3^2=-24\\\\
(x-4)^2+(y-3)^2-16-9=-24\\\\(x-4)^2+(y-3)^2-25=-24\quad|+25\\\\\boxed{(x-4)^2+(y-3)^2=1}$

So the answer is C (the same left side of equation).

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3 years ago