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2 years ago

If -2 is a zero the polynomial 3x^2+2x+k, find the value of k

Mathematics

1 answer:

UNO [17]2 years ago

4 0

Answer:

value of K =16

I hope it's helps you

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PLEASE HELP 10 POINTS!!!

inna [77]

Answer:

Step-by-step explanation:

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2 years ago

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The volume of a sphere can be described by the following formula, where V = volume and r = radius of the sphere.

Anika [276]

Option C: $r = \sqrt[3]{\frac{3V}{4\pi} }$ is the right answer

Step-by-step explanation:

Given formula for volume of a sphere is:

$V = \frac{4}{3}\pi r^3$

We have to make r the subject of the formula

Multiplying equation by 3/4

$\frac{3}{4}V = \frac{4}{3} * \frac{3}{4} \pi r^3\\\frac{3}{4}V = \pi r^3$

Dividing both sides by pi

$\frac{3}{4\pi}V =\frac{ \pi r^3}{\pi}\\\frac{3V}{4\pi} = r^3$

Taking cube root on both sides

$\sqrt[3]{\frac{3V}{4\pi} } = \sqrt[3]{r^3} \\ r = \sqrt[3]{\frac{3V}{4\pi} }$

Hence,

Option C: $r = \sqrt[3]{\frac{3V}{4\pi} }$ is the right answer

Keywords: Volume, Sphere

Learn more about volume at:

#LearnwithBrainly

5 0

2 years ago

The equation πr²Gives the area,A of a circle with a radius,r,. Solve the function for π

zalisa [80]

$\bf \textit{area of a circle}\\\\ A=\pi r^2\qquad \qquad \implies \qquad \cfrac{A}{r^2}=\pi$

7 0

2 years ago

If a train travels for 4.5 hours at a rate of 40 mph, what is the distance the train will travel?

Nuetrik [128]

The answer is 180.add 40 to its self or multiply by 4 then add 20 for the .5 portion, 40x4=160 160+20=180.

hoped this helped =)

4 0

2 years ago

Help how do you do this help fast please

GalinKa [24]

Answer:

x= 50°

Hope it helps!

Step-by-step explanation:

The sum of the exterior angles of a polygon is always 360°

So, x+40+x+20+2x+2x = 360

6x + 60= 360

6x = 360-60 = 300

6x= 300

x= 300/6

= 50

7 0

2 years ago

If -2 is a zero the polynomial 3x^2+2x+k, find the value of k​

If -2 is a zero the polynomial 3x^2+2x+k, find the value of k