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3 years ago

Simplify: (4x2 - 9x + 11)(x - 6)

Mathematics

1 answer:

Ilia_Sergeevich [38]3 years ago

7 0

Answer:

It's option B. 4x^3 - 33x^2 + 65x - 66

See the attached image for my work:

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Multiply 1/10x17/18 pls help I'll give u brainlest

Andrej [43]

Calculate :

$\frac{1}{10} \times \frac{17}{18} = \frac{1 \times 17}{10 \times 18} = \frac{17}{180}$

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3 years ago

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Find the area of the part of the paraboloid z = 9 - x^2 - y^2 that lies above the xy-plane.

svetoff [14.1K]

Parameterize this surface (call it $S$ ) by

$\vec r(u,v)=u\cos v\,\vec\imath+u\sin v\,\vec\jmath+(9-u^2)\,\vec k$

with $0\le u\le3$ and $0\le v\le2\pi$ . Take the normal vector to $S$ to be

$\vec r_u\times\vec r_v=2u^2\cos v\,\vec\imath+2u^2\sin v\,\vec\jmath+u\,\vec k$

Then the area of $S$ is

$\displaystyle\iint_S\mathrm dA=\iint_S\|\vec r_u\times\vec r_v\|\,\mathrm du\,\mathrm dv$

$=\displaystyle\int_0^{2\pi}\int_0^3u\sqrt{1+4u^2}\,\mathrm du\,\mathrm dv$

$=\displaystyle2\pi\int_0^3u\sqrt{1+4u^2}\,\mathrm du=\boxed{\frac{37\sqrt{37}-1}6\pi}$

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4 years ago

Find the missing side of the triangle. Round to nearest tenth if needed.

mote1985 [20]

Answer:

6.7

Step-by-step explanation:

6.7 because 3.4 is way to small 7.9 would be close but not the right length and 8.5 is way too long to be on the bottom.

Hope this help stay home stay safe.

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3 years ago

The points (1,1) and (7,3) are vertices of a parallelogram.

mixer [17]

Step-by-step explanation:

enjoyyyyyyyyy brooooo

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2 years ago

Which system is equivalent to 3x^2 - 4y^2 = 25

Archy [21]

For this case we have the following system of equations:

$3x ^ 2 - 4y ^ 2 = 25\\-6x ^ 2 - 2y ^ 2 = 11$

We can write a system of equivalent equations.

For this, it is enough to multiply one of the two equations by a scalar.

Multiplying the equation 1 by 2, we have:

$6x ^ 2 - 8y ^ 2 = 50$

Therefore, the new system of equations is:

$6x ^ 2 - 8y ^ 2 = 50\\-6x ^ 2 - 2y ^ 2 = 11$

Answer:

A system that is equivalent is:

D) $6x ^ 2 - 8y ^ 2 = 50\\-6x ^ 2 - 2y ^ 2 = 11$

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3 years ago

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