3 years ago

PLZ HELP ASAP MARKIN BRAINIEST !!!

1 answer:

3 0

Put a dot on -7 and -1 so the slope is 3 over 2x for the first inequality and the y is -1 do rise over run for each the slope for second is 1 over 1 put a dot for both on y axis (:

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7 2 2 2 3 8 0 58 9 3 7 10 0

worty [1.4K]

Answer:

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Step-by-step explanation:

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3 years ago

If the diameter of a circle is 5, what is its circumference?

DanielleElmas [232]

Multiply the diameter by PI which is 3.14 so that means the circumference would be 15.7.

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3 years ago

What is the product of? (7x^2)(2x^3+5)(x^2-4x-9)

pav-90 [236]

$(7x^{2})(2x^{3} +5)( x^{2} -4x-9)
$
$(14 x^{5} +35 x^{2})( x^{2} -4x-9)$
= $14 x^{7} -56 x^{6}-126 x^{5}+35 x^{4}-140 x^{3}-315 x^{2}$

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3 years ago

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If a=i+7j+k and b=i+11j+k, find a unit vector with positive first coordinate orthogonal to both a and

Scilla [17]

Take the cross product, then normalize the result.

$\mathbf a\times\mathbf b=\begin{vmatrix}\mathbf i&\mathbf j&\mathbf k\\1&7&1\\1&11&1\end{vmatrix}=-4\,\mathbf i+4\,\mathbf k$

This has norm

$\|\mathbf a\times\mathbf b\|=\sqrt{(-4)^2+4^2}=4\sqrt2$

and so a unit vector orthogonal to both given vectors is

$\dfrac{\mathbf a\times\mathbf b}{\|\mathbf a\times\mathbf b\|}=-\dfrac1{\sqrt2}\,\mathbf i+\dfrac1{\sqrt2}\,\mathbf k$

An equally correct answer would be the negative of this vector, since $\mathbf b\times\mathbf a=-\mathbf a\times\mathbf b$ .

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3 years ago

PLS HELP I HAVE LEGIT 20 MINUTES TO FINISH BY 11:59 IM PANICKING PLS HELP WITH THESE QUESTIONS

poizon [28]

I’m pretty sure it is 19.2 units

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2 years ago

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