3 years ago

What’s the difference between nine and twice a number,x, is one

Mathematics

1 answer:

coldgirl [10]3 years ago

6 0

9/2x=1 is probably right

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What is the midpoint of the x-intercepts of f(x) = (x – 2)(x – 4)?

tatyana61 [14]

The x-intercepts are readily identified on the graph: (2,0) and (4,0). The midpoint of a line connecting those 2 points would be (3,0).

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2 years ago

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Find the directional derivative of f(x,y,z)=2z2x+y3f(x,y,z)=2z2x+y3 at the point (−1,4,3)(−1,4,3) in the direction of the vector

Feliz [49]

$f(x,y,z)=2z^2x+y^3$

$f$ has gradient

$\nabla f(x,y,z)=2z^2\,\vec\imath+3y^2\,\vec\jmath+4xz\,\vec k$

which at the point (-1, 4, 3) has a value of

$\nabla f(-1,4,3)=18\,\vec\imath+48\,\vec\jmath-12\,\vec k$

I'm not sure what the given direction vector is supposed to be, but my best guess is that it's intended to say $\vec u=15\,\vec\imath+25\,\vec\jmath$ , in which case we have

$\|\vec u\|=\sqrt{15^2+25^2}=5\sqrt{34}$

Then the derivative of $f$ at (-1, 4, 3) in the direction of $\vec u$ is

$D_{\vec u}f(-1,4,3)=\nabla f(-1,4,3)\cdot\dfrac{\vec u}{\|\vec u\|}=\boxed{\dfrac{294}{\sqrt{34}}}$

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3 years ago

Pete wants to buy a stack of clothing that totals $200. The sales tax is 6%. If you add the tax to his total bill what is Pete's

lara [203]

When you calculate that all up you get 212

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3 years ago

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Angle D and Angle F are supplementary. The measure of Angle D is (3x + 5), and the measure of angle F is (2x). What is the measu

olga55 [171]

Step-by-step explanation:

Two angles are called suplementary when their measures add to 180 degrees.

D+F= 180

3x+5+2x= 180

5x+5=180

5x= 175

x= 35°

angle D = 3x+5= 3(35)+5= 110°

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2 years ago

Which ratio is equivalent to 1 to 8? 7 to 14 7 to 9 6 to 41 6 to 48

Ivan

6 to 48 simplified

it becomes 1 to 8

so the answer is 6 to 48

plz mark as brainliest

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2 years ago

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