4 years ago

What is the value of x in kite EFGH

Mathematics

1 answer:

Artyom0805 [142]4 years ago

8 0

the triangle are equal and x

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8inches hope this helps

Step-by-step explanation:

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Which expression equals the fraction of the square that is shaded dark blue?

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Step-by-step explanation:

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2 years ago

Find the volume of revolution bounded by the curves y = 4 – x2 , y = x, and x = 0, and is revolved about the vertical axis.

aleksley [76]

$4-x^2=x\\
x^2+x-4=0\\
\Delta=1^2-4\cdot1\cdot(-4)=1+16=17\\
x_1=\dfrac{-1-\sqrt{17}}{2}\\
x_2=\dfrac{-1+\sqrt{17}}{2}\\\\
\displaystyle
V=\pi\int\limits_0^{\dfrac{-1+\sqrt{17}}{2}}(4-x^2-x)^2\,dx\\
V=\pi\int\limits_0^{\dfrac{-1+\sqrt{17}}{2}}(16-4x^2-4x-4x^2+x^4+x^3-4x+x^3+x^2)\,dx\\
V=\pi\int\limits_0^{\dfrac{-1+\sqrt{17}}{2}}(x^4+2x^3-7x^2-8x+16)\,dx\\
V=\pi \left[\dfrac{x^5}{5}+\dfrac{x^4}{2}-\dfrac{7x^3}{3}-4x^2+16x\right]_0^{\dfrac{-1+\sqrt{17}}{2}}\\
$

The rest of solution in the attachment.

There's a mistake in the picture
It shoud be
$V=\pi\left(\dfrac{289\sqrt{17}-521}{60}\right)\approx35$

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3 years ago

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4x^2 + 8x - 11x + 6 - 5x^2 + 2

Alenkinab [10]

I like to change all the subtraction to addition of the negative.
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Now combine the like terms.
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Your answer is A: -x^2 - 3x + 8

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4 years ago

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