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3 years ago

8,minus some number divided by 3, equals 6. find the numbers

Mathematics

1 answer:

algol [13]3 years ago

5 0

8 - (-10) = 18
18 / 3 = 6
hope this helps

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What is the length of EF in the right triangle below?

Tema [17]

Answer:

Step-by-step explanation:

Since the triangle is right use Pythagoras' identity to find EF

The square on the hypotenuse is equal to the sum of the squares on the other two sides, that is

EF² + DF² = DE² ← substitute values

EF² + 12² = 18², that is

EF² + 144 = 324 ( subtract 144 from both sides )

EF² = 180 ( take the square root of both sides )

EF = $\sqrt{180}$ → A

3 0

3 years ago

PLEASE HELP :((((

sertanlavr [38]

88(3.7+4.3)-2*2.6

88(8)-2*2.6

704-2*2.6

704-5.2

698.8

I hope it helps!

Please mark Brainliest if it does!:-)

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2 years ago

413/19 and I have to check using multiplication answer fast pls I’ll give 25 points

Sidana [21]

413/19 = 21.737
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6 0

3 years ago

Simplify 4x^5 X 6x^10

sattari [20]

Use photo math it’s really helpful

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2 years ago

Find the surface area and volume of cone. A = rs + r2 V = 1/3r2 h A cone's slant height (s) is 14 cm and its radius is 4.5 cm. S

Reptile [31]

Answer:

Surface area = $261.6cm^2$

Volume = $281.2cm^3$

Step-by-step explanation:

To find the surface area of our cone, we are using the formula for the surface area of a cone:

$A=\pir(r+\sqrt{h^2+r^2} )$

where

$A$ is the surface area

$r$ is the radius

$h$ is the height

Notice that the height, radius, and slant height make a right triangle, so to find the height, $h$ , we can use the Pythagorean theorem:

$s^2=r^2+h^2$

$14^2=4.5^2+h^2$

$196=20.25+h^2$

$h^2=196-20.25$

$h^2=175.75$

$h=\sqrt{175.75}$

$h=13.26$ cm

We have all we need now to find the surface area of our cone:

$A=\pir(r+\sqrt{h^2+r^2} )$

$A=\pi(4.5)(4.5+\sqrt{13.26^2+4.5^2} )$

$A=261.6cm^2$

Now, to find the volume of our cone, we are using the formula for the volume of a cone:

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

where

$V$ is the volume

$r$ is the radius

$h$ is the height

Replacing values

$V=\frac{\pi (4.5^2)(13.26)}{3}$

$V=281.2cm^3$

We can conclude that the surface area of our cone is 261.6 square centimeters and its volume is 281.2 cubic centimeters.

7 0

3 years ago

Read 2 more answers