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2 years ago

If f(x) = 2x + 3, what is f(–2)?

Mathematics

2 answers:

Mumz [18]2 years ago

7 0

Substitute -2 for x

$f( - 2) = 2( - 2) + 3 \\ y = - 4 + 3 \\ y = - 1$

Hope it helps

Please give brainliest

Anton [14]2 years ago

5 0

Answer:

-1

Step-by-step explanation:

Hi student! Let me help you out on this question.

_____________________

To find the value of f(-2), we need to stick in -2 for x.

$\mathsf{f(-2)=2\cdot(-2)+3}$ . Multiply first.

$\mathrm{f(-2)=-4+3}$ . Now simplify completely.

$\mathsf{f(-2)=-1}$ . Which is our final answer.

Hope that this helped you out! have a good day ahead.

Best Wishes!

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<em>◆◈-Greetings!-◆◈</em>

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3 years ago

3-2 to the power of 2

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3 years ago

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tangare [24]

Answer:

$(x-3)^2=8(y+1)$

Step-by-step explanation:

Standard form of a parabola with a vertical axis of symmetry:

$(x-h)^2=4p(y-k) \quad \textsf{where}\:p\neq 0$

$\textsf{Vertex}=(h, k)$

$\textsf{Focus}=(h,k+p)$

$\textsf{Directrix}:y=(k-p)$

$\textsf{Axis of symmetry}:h=k$

If p > 0, the parabola opens upwards, and if p < 0, the parabola opens downwards.

From inspection of the graph:

Vertex = (3, -1)
Directrix = y = -3

Therefore:

h = 3
k = -1
k - p = -3

Use the Directrix equation to find p

⇒ y = (k - p)

⇒ -3 = -1 - p

⇒ p = 2

Therefore the equation of the conic section is:

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$\implies x^2-6x+9-8=8y$

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