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nadezda [96]
2 years ago
12

Find the surface area of this cylinder.

Mathematics
2 answers:
jonny [76]2 years ago
5 0

Answer:

113.1

Step-by-step explanation:

2πrh + 2πr^2

2 * π * 3*3 + 2π*3^2

= 113.097

round it to 113.1

Answered by Gauthmath

borishaifa [10]2 years ago
4 0

Formula for the surface area of a cylinder: 2 x pi x r^2 + 2 x pi x r x h

Radius (r) = 3

Height (h) = 3

2 x pi x 3^2 + 2 x pi x 3 x 3

2 x pi x 9 + 2 x pi x 9

18pi + 18pi

36pi = 113.1 cm^2

Hope this helps!

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mario62 [17]
R = radius
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2 years ago
X-5y=21 and-6x=24 solve by substitution
Zepler [3.9K]

Answer:

The value of x is (-4) and y is (-5)

Step-by-step explanation:

<h3><u>Given</u>;</h3>
  • x – 5y = 21
  • -6x = 24
<h3><u>To Find</u>;</h3>
  • Value of x
  • Value of y

Now,

-6x = 24

-6x/(-6) = 24/(-6)

x = -4

So, Substitute the value of x in x – 5y = 21

x – 5y = 21

-4 – 5y = 21

-4 + 4 – 5y = 21 + 4

-5y = 25/

-5y/(-5) = 25/(-5)

y = -5

Thus, The value of x is (-4) and y is (-5)

<h3><u>For </u><u>Verification</u>;</h3>

x – 5y = 21

-4 – 5(-5) = 21

-4 + 25 = 21

21 = 21

-6x = 24

-6(-4) = 24

24 = 24

L.H.S = R.H.S

Hence Verified!

<u>-TheUnknownScientist 72</u>

8 0
2 years ago
Why do we use a coeficient to remove the propotionality
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Constant is the scale term in proportionality. Suppose one variable is dependent on the other and one variable become twice, other becomes also twice and if one becomes half, other too becomes half., but they are two different variables which are no-where linked (like cost(money) vs quantity). Quantity and cost are two different things but they abridge a mathematical relation of proportionality. So in the mathematics to abridge these two different variables, we need something. Constant serves that purpose.
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What is the equation of the line that passes through the point (2, -1) and has a slope of 3/2?​
barxatty [35]

Answer:x=-2

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6 0
3 years ago
What is the solución of the equation x2-4x+1=0?
koban [17]

Answer:

x = 2 + √3 and

x = 2 - √3

Step-by-step explanation:

Please use " ^ " to denote exponentiation:  x^2 - 4x + 1 = 0.

Here you have multiple choices of methods of solution:

quadratic formula, completing the square, graphing, and so on.

If we complete the square, then:                   x^2 - 4x + 1 = 0 becomes

                                                                       x^2 - 4x + 4 - 4 + 1 = 0, or

(x - 2)^2 = 3

Taking the square root of both sides, we get x - 2 = ±√3, so that the roots are:

x = 2 + √3 and

x = 2 - √3

6 0
4 years ago
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