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3 years ago

I'll give brainliest if correct.

Mathematics

2 answers:

Hitman42 [59]3 years ago

4 0

Answer:

4,7

Step-by-step explanation:

jek_recluse [69]3 years ago

4 0

Answer:

4,7

Step-by-step explanation:

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Use the given conditions to write an equation for the line in point-slope form. passing through (1,-7) with x-intercept=-1

Free_Kalibri [48]

Look for the calculator for algebra online

4 0

4 years ago

If f(x)=7x+8 and g(x)=x^4, what is (g°f)(0)

Lina20 [59]

G(f(x))= (7x+8)^4
g(f(x))= (7(0)+8)^4
=(0+8)^4
=8^4
=8•8•8•8
=4,096

8 0

3 years ago

Read 2 more answers

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

$A=4 \pi r^2$

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

$A'=2\pi r^2 + \pi r^2 = 3 \pi r^2$

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

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

6 0

3 years ago

Can someone please tell me what r^2 - 9 = is?

cestrela7 [59]

Answer:

The answer is (r + 3)(r - 3)

Step-by-step explanation:

There need to be two number that add together to get 0

and two number that multiply together to get -9

3 + -3 = 0

3 · -3 = -9

= (r + 3)(r - 3)

6 0

4 years ago

Solve the following inequality:<br> -(x - 1) + 20 <-3(x - 3)<br> What?

mamaluj [8]

Answer:

x<15

Step-by-step explanation:

-(x - 1) + 20 <-3(x - 3)

-x + 1 + 20 <-3x + 9

-x + 21 < -3 + 9

-x < -3 + 9 - 21

-x÷ -1 < -15 ÷ -1

x > 15

5 0

3 years ago