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love history [14]
3 years ago
12

The circumference of a circle is 11 pi inches.

Mathematics
1 answer:
ser-zykov [4K]3 years ago
8 0

9514 1404 393

Answer:

  30.25π square inches

Step-by-step explanation:

You can use the formula for area in terms of circumference:

  A = C²/(4π)

  A = (11π)²/(4π) = (121/4)π = 30.25π . . . square inches

_____

You may be expected to find the radius first:

  C = 2πr   ⇒   r = C/(2π) = 11π/(2π) = 5.5 . . . inches

Then use the area formula:

  A = πr² = π(5.5 in)² = 30.25π in²

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Helen [10]
-2 x 3 +4

-6+4

the answer is -2

then for the second one

5+4 x 6

5+24
answer =29
3 0
3 years ago
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Help please will mark brainliest
natima [27]

Answer:

A table that has (0,0), (-1,1), (-4, 2) and undefined for any positive x value

Step-by-step explanation:

Reflecting across the y axis just changes the x values, it makes them negative.  so \sqrt{x} has points (0,0), (1,1), (4, 2) and so on.  reflecting over the y axis makes them(0,0), (-1,1), (-4, 2) and again so on.

Also good to mention in \sqrt{x} negative x values are undefined, so flipped over the y axis positive x values are undefined.

As for the answer it doesn't look like any of those shown.  The first one is close, but the x values would need to swap their signs.  

6 0
3 years ago
Quadratic Equations: <br><br> Write x^2 - 3x + 2 = 0 in standard form and determine a, b, and c
anyanavicka [17]
A=1
b=-3
c=2
x=2,1

Hope this helped :-)
5 0
3 years ago
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Three more than three times a number is one less than two times the number what is the number
Yanka [14]
In the given question, there are several information's of immense importance. using these information's the correct and the required answer can be determined. It is given that an unknown number has to be found from the information's provided.
Let us assume the unknown number = x
Then
3x + 3 = 2x -1
3x - 2x = -1 -3
x = -4
So the unknown number is -4.
It should be remembered that these are trick questions and it is important to go through each lines very carefully to understand the inner meaning.
4 0
3 years ago
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Resuelve las siguientes ecuaciones y luego verifica<br> A-)3x +1=7<br> B-)2a-2=1+3a
jarptica [38.1K]

Answer:

A) x=2

B) a=-3

Step-by-step explanation:

La primera ecuación dada es,

A) 3x + 1 = 7

Reste 1 de ambos lados, tenemos

3x +1-1=7-1

\Rightarrow 3x=6

Dividir por 3 (ya que 3 es un número distinto de cero) de ambos lados, tenemos

\frac{3x}{3}=\frac {6}{3}

\Rightarrow x=2

Ahora, compruebe si x = 2 es la solución correcta o no.

El lado izquierdo de la ecuación dada es 3x + 1.

Ponga x = 2, tenemos

3\times2+1=7

Que es igual al lado derecho de la ecuación dada.

Por tanto, x = 2 es la solución correcta.

La segunda ecuación es

B) 2a-2=1+3a

Reste 3a de ambos lados, tenemos

2a-2-3a=1+3a-3a

\Rightarrow -a-2=1

Suma 2 de ambos lados, tenemos

-a-2+2=1+2

\Rightarrow -a=3

Multiplica por -1 (como -1 es un número distinto de cero) de ambos lados, tenemos

-a\times (-1)=3\times(-1)

\Rightarrow a=-3

Ahora, verifique si a = -3 es la solución correcta o no

El lado izquierdo de la ecuación dada es 2a-2.

Ponga a = -3, tenemos

2\times(-3)-2=-8

El lado derecho de la ecuación dada es 1 + 3a.

Ponga a = -3, tenemos

1+3\times(-3)=-8.

Aquí, al poner a = -3, el valor del lado izquierdo es igual al valor del lado derecho.

Por tanto, a = -3 es la solución correcta.

8 0
3 years ago
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