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HACTEHA [7]
3 years ago
6

The raduis of a circle is 12 cm. What is the area? ( Use approximation)

Mathematics
2 answers:
gladu [14]3 years ago
8 0

Answer:

The area is 452 cm2

Step-by-step explanation:

We use the formula:

Area = π (raduis)2 =π (12cm)´2 = 452, 39 cm2

OLga [1]3 years ago
4 0

Answer: 452.16 cm²

Step-by-step explanation: To find the area of a circle, start with the formula for the area of a circle.

Area = πr²

Notice that the radius of our circle is 12 cm so we can plug a 12 in for the radius in our formula.

Area = (π)(12cm)²

12 cm² is equal to 12 cm × 12 cm or 144 cm².

Area = 144π cm²

So the area of the circle is 144π cm².

Now, remember that π is approximately equal to 22/7 or 3.14 so we can estimate the area of the circle by plugging in 3.14 for π.

So we have (144)(3.14) which is equal to 452.16 cm².

So the area of the circle is approximately equal to 452.16 cm².

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3x * -2y= -100<br> Solve for y and x.
Sedbober [7]

Answer:

x=50/3y

y=50/3x

Step-by-step explanation:

Isolate the variable by dividing each side by factors that don't contain the variable.

7 0
3 years ago
Solve the following system of equations algebraically:<br> 4x - 5y = 18<br> 3x – 2y = 10
fiasKO [112]

Answer:

D

Step-by-step explanation:

Given the 2 equations

4x - 5y = 18 → (1)

3x - 2y = 10 → (2)

Multiplying (1) by 3 and (2) by - 4, then adding will eliminate the x- term

12x - 15y = 54 → (3)

- 12x + 8y = - 40 → (4)

Add (3) and (4) term by term to eliminate x, that is

- 7y = 14 ( divide both sides by - 7 )

y = - 2

Substitute y = - 2 into either of the 2 equations and solve for x

Substituting into (1)

4x - 5(- 2) = 18

4x + 10 = 18 ( subtract 10 from both sides )

4x = 8 ( divide both sides by 4 )

x = 2

solution is (2, - 2 ) → D

8 0
3 years ago
Evaluate the expression for the given value of variable(s)
Olenka [21]
You would: 
(4 * 2 - 4) + (3 - 2^2) + (2 * 2^3)
(8 - 4) + (3 - 4) + (16)
4 + -1 + 16 = 19
8 0
3 years ago
Hola me podrían ayudar por favor. Convertir las fracciones a decimales y ubicar a los decimales en la recta numérica. a. 2/3 b.
NISA [10]

Answer:

Step-by-step explanation:

a decimal

2/3 = 0.7

8/5 = 1.6

-5/2 = -2.5

7/4 = 1.8

9/2 =  4.5

-11/3 = -3.7

13/5 = 2.6

-7/4 = -1.8

Esto es solo un bosquejo del número, usando un gráfico, use 0.1 para una unidad en la recta numérica.

-  ________________________________________________________ +

  |    |     |      |     |       |      |       |     |     |     |    |       |     |     |      |     |     |       |            

-5  -4 -3.7  -3 -2.5  -2  -1.8   -1    0  0.7  1   1.6  1.8  2   2.6   3   4   4.5   5

8 0
3 years ago
State the range of the graph and explain what the graph represents.
Eva8 [605]

Answer:

The range of the graph is [-10, 10]

Step-by-step explanation:

This represents how the y-values of the graph range from -10 to 10.

Because there are no arrow marks on the ends of the graph, we know that the graph stops there at -10 and 10 and doesn't go beyond that.

3 0
3 years ago
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