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3 years ago

The volume of a sphere of radius 3 cm is

Mathematics

1 answer:

In-s [12.5K]3 years ago

3 0

Answer:

3^3 = 27

27 * 3.14 = 84.78

84.78 * 4/3 = 113.04 is your answer.

Formula of volume of sphere is:

4/3 x π(3.14 or 22/7 whatever they tell you to use for pi) x r^3(your radius being cubed)

You get your radius by finding out what is half of your diameter or your given radius.

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What is the value of x in the equation ? 2.5(6x-4)=10+4(1.5+.05x)

natima [27]

Answer:

x=2

Step-by-step explanation:

Distribute

15x-10=10+6+2x

simplify

15x-10=16+2x

subtract 2x to get x on one side

13x-10=16

add 10

13x=26

divide

x=2

8 0

3 years ago

-x -7y = 14<br> -4x -14y =28

koban [17]

Given:

$\to \bold{-x -7y = 14}\\\\\to \bold{-4x -14y =28}\\\\$

To find:

$\bold{x \ and \ y}=?$

Solution:

$\to \bold{-x -7y = 14}..................... (i) \\\\\to \bold{-4x -14y =28} .................(ii)\\\\$

Solving the equation (i):

$\to \bold{-x -7y = 14} \\\\ \to \bold{-x= 14+7y} \\\\ \to \bold{x= - (14+7y)} \\\\$

Putting the value of x into the equation (ii):

$\to \bold{-4(-(14+7y)) -14y =28} \\\\\to \bold{4(14+7y) -14y =28} \\\\\to \bold{56+28y -14y =28} \\\\\to \bold{56+14y =28} \\\\\to \bold{28+14y =0} \\\\\to \bold{14y =-28} \\\\\to \bold{y =\frac{-28}{14}} \\\\\to \bold{y =-2} \\\\$

Putting the value of y into the equation (i):

$\to \bold{-x -7(-2) = 14}\\\\\to \bold{-x +14 = 14}\\\\\to \bold{-x = 14-14}\\\\\to \bold{x = 0}\\\\$

So, the value of $\bold{x=0 \ and\ y= -2}\\\\$

Learn more:

brainly.com/question/10151402

7 0

3 years ago

Please show work Thxs

natta225 [31]

As the y intercept lies on the x-axis, x=0

To find the y-intercept, put x=0 into the equation:

$3(0) - 2y = - 18 \\ 0 - 2y = - 18 \\ - 2y = - 18 \\ y = \frac{18}{2} \\ y = 9$

Therefore,the y-intercept=9.

Hope it helps!

5 0

4 years ago

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1. Dot collected rainfall data for 5 days in October. If the total rainfall for the 5 days was 2.65 inches, how much rain fell o

Marina86 [1]

Answer:

ope

Step-by-step explanation:

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3 years ago

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