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Lapatulllka [165]
2 years ago
10

What is the surface area of a sphere with radius 2?

Mathematics
1 answer:
VladimirAG [237]2 years ago
8 0

\textit{surface area of a sphere}\\\\ SA=4\pi r^2~~ \begin{cases} r=radius\\[-0.5em] \hrulefill\\ r=2 \end{cases}\implies \begin{array}{llll} SA=4\pi (2)^2\implies SA=16\pi \\\\\\ SA\approx 50.27 \end{array}

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Solve the linear system using substitution
levacccp [35]
Hello there!

3x - y = 3
-x + y = 3

We need to solve 3x - y = 3 for y

Let start by adding -3x to both sides

3x - y = 3

3x - 3x - y = 3 - 3x

-y = 3 - 3x
We cannot leave the variable with a negative sign. We must multiply both sides by -1

-y * -1= (3 - 3x)-1

y = 3x - 3

Substitute 3x -3 for y in -x+y=3

-x + y = 3

-x + 3x - 3 = 3

2x - 3 = 3

2x = 3 + 3

2x = 6

x = 6/2

x = 3

Now substitute 3 for x in y=3x -3

y = 3x - 3

y = 3(3) - 3

y= 9 - 3

y= 6

Thus,

The answer is x=3 and y=6

It is always my pleasure to help students like you :)

As always, I am here to help!


7 0
3 years ago
Maya collected data about the number of ice cubes and milliliters of juice in several glasses of juice and organized the data in
Alex_Xolod [135]

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Step-by-step explanation:

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5 0
3 years ago
Here is a growing pattern of squares:
Flura [38]

Answer:

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Step-by-step explanation:

3 0
2 years ago
How do you factor: x^2-4x+2xy-8y?
hoa [83]

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Factor out the greatest common factor (GCF) from each group.

x(x−4)+2y(x−4)

Factor the polynomial by factoring out the greatest common factor,  x−4.

(x−4)(x+2y)

I believe this is correct. Good luck.

3 0
3 years ago
In figuring his net income, Mr.Halkides listed his salary income of $15,000, $258 from his dividends,and $2562 from the sale of
Black_prince [1.1K]
Net income is all cost factors put together, so total income minus total expenses.

15000 + 258 + 2562 = 17820
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17820 - 2992 = $14828
5 0
3 years ago
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