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Andrew [12]
3 years ago
8

The radius of a circle is (x-3)m. find the area of the circle

Mathematics
1 answer:
Flura [38]3 years ago
8 0

Answer:

πx² -6πx + 9π

or

π(x² - 6x + 9)

Step-by-step explanation:

area = πr² = π(x-3)² = π(x² - 6x + 9) = πx² - 6πx + 9π

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si entre 2 obreros tardan 10 días en hacer una carretera, ¿cuánto tardarán en hacer el mismo trabajo 4 obreros?
Olegator [25]

Answer:

5 dias

Step-by-step explanation:

10/2= 5

8 0
3 years ago
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Factor: X^3 + 216 <br><br> also, what kind of favoring is this called?
kondaur [170]

Answer:

Step-by-step explanation:

a³+b³=(a+b)(a²-ab+b²)

x³+216=x³+6³=(x+6)(x²-6x+6²)=(x+6)(x²-6x+36)

5 0
3 years ago
Please help me out, i can not understand this, i will give a brainliest out to whoever can help me
marishachu [46]

Answer:

So try 0-6

Step-by-step explanation:

6 0
2 years ago
How do you add vectors? Add the vector &lt;3,4&gt; to the vector that goes 7 units at an angle of 2π/3.
lawyer [7]

Answer:

The sum of the two vectors is the vector <-0.5 , 4+3.5\sqrt{3} >

Step-by-step explanation:

The horizontal component (x) of a vector whose magnitude is b units and its direction is Ф° is b cos Ф

The vertical component (y) of a vector whose magnitude is b and its direction is Ф is b sin Ф

The vector is <b cos Ф , b sin Ф>

∵ The vector goes 7 units at an angle \frac{2\pi }{3}

- That means its magnitude is 7 and its direction is  \frac{2\pi }{3}

∴ x = 7 cos(  \frac{2\pi }{3} )

∴ y = 7 sin(  \frac{2\pi }{3} )

∵ cos(  \frac{2\pi }{3} ) =  -\frac{1}{2}

∵ sin(  \frac{2\pi }{3} ) =  \frac{\sqrt{3}}{2}

- Substitute them in x and y

∴ x = (7)( -\frac{1}{2} )

∴ x = -3.5

∴ y = (7)( \frac{\sqrt{3}}{2} )

∴ y = 3.5\sqrt{3}

∴ The vector is <-3.5 , 3.5\sqrt{3}>

Now lets add the vectors by adding xs and ys components

∵ <3 , 4> + <-3.5 , 3.5\sqrt{3} > = <3 + -3.5 , 4 + 3.5\sqrt{3} >

∴  <3 , 4> + <-3.5 , 3.5\sqrt{3}> = <-0.5 , 4+3.5\sqrt{3} >

∴ The sum of the two vectors is the vector <-0.5 , 4+3.5\sqrt{3} >

5 0
3 years ago
Uhm well ;-; here is something easy for y'all ;-;
Stells [14]

Answer:

$80.00

Step-by-step explanation:

We have: 120 ft = 40 yards (divide the length value by 3 )

=> Jerome will cost: 40 x $2.00 = $80.00 for the fencing.

3 0
3 years ago
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