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3 years ago

Which equation can be rewritten as x + 4=x2 assume x>0

Mathematics

1 answer:

antoniya [11.8K]3 years ago

5 0

I'm guessing that x2 is an x to the power of 2, so u can rewrite that as:

x^2 - x - 4

from there you can use completing the square, quadratic function, or factoring.

If the x2 is supposed to be 2x then it would just be as follows:

x - 4

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Circles A, B, and C overlap. x is in the overlap of circles A and B. Which of the following are true about x? Check all that app

Bond [772]

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Answer:

b, c, d, e, f

Step-by-step explanation:

x ∉ A . . . . . not true, x is in A

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2 years ago

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Answer:

the older sister is 27 and the younger is 25.

Step-by-step explanation:

C+2=Y

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3 years ago

Eamon is arranging 39 books on 3 shelves. If he puts the same number of books on each shelf, how many books will there be on eac

blagie [28]

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3 years ago

A storage tank will have a circular base of radius r and a height of r. The tank can be either cylindrical or hemispherical (ha

Neko [114]

Answer:

Volume: $\frac{2}{3}\pi r^3$

Ratio: $\frac{2}{9}r$

Step-by-step explanation:

First of all, we need to find the volume of the hemispherical tank.

The volume of a sphere is given by:

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

where

r is the radius of the sphere

V is the volume

Here, we have a hemispherical tank: a hemisphere is exactly a sphere cut in a half, so its volume is half that of the sphere:

$V'=\frac{V}{2}=\frac{\frac{4}{3}\pi r^3}{2}=\frac{2}{3}\pi r^3$

Now we want to find the ratio between the volume of the hemisphere and its surface area.

The surface area of a sphere is

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For a hemisphere, the area of the curved part of the surface is therefore half of this value, so $2\pi r^2$ . Moreover, we have to add the surface of the base, which is $\pi r^2$ . So the total surface area of the hemispherical tank is

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Therefore, the ratio betwen the volume and the surface area of the hemisphere is

$\frac{V'}{A'}=\frac{\frac{2}{3}\pi r^3}{3\pi r^2}=\frac{2}{9}r$

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2 years ago

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Svet_ta [14]

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3 years ago