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nirvana33 [79]
3 years ago
11

Write a polynomial that represents the area of the square.

Mathematics
1 answer:
Anika [276]3 years ago
4 0

Answer: x^2+8x+16

Step-by-step explanation:

It is important to remember that the formula for calculate the area of a square is:

A=s^2

Where "s" is the side lenght of the square.

From the figure you can identify that the side lenght of the square can be represented with this expression:

x+4

Therefore, the following expression represents the area of the square:

(x+4)^2

In order to simplify it, you need to remember that:

(a\±b)^2=a^2\±2ab+b^2

Then, you get that the polynomial that represents the area of the given square, is:

=x^2+2(x)(4)+4^2=x^2+8x+16

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Area of a triangle is 1/2 x base x height.

base = 12

Height = x+6

Area = 1/2 * 12 * x+6

Area = 1/2 * 12x * 72

Area = 6x + 36



Perimeter is the sum of the 3 sides:

x-7 + 12 + 2x+5

3x -2 + 12

3x+10


The last choice is the correct answer.



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3 years ago
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A circle with circumference 18 had an arc with 120 central angle. what is the length of the arc
lawyer [7]

Answer:

A circle with circumference 18 had an arc with 120 central angle.

=> Radius of that circle: R = 18/(2 x pi) = 2.86

=> Length of that arc: L = R x 120 x pi/180 = 2.86 x (2/3) x pi = 5.99

Hope this helps!

:)

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3 years ago
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If there is a 75 x 50 hardwood top and bottom rail in this fence to connect the posts, how many 5.4 m long lengths of timber rai
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Answer:

3,750

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2 years ago
Which is the area of a circle with a radius of 5 units? (use 3.14 for )?
Sauron [17]
The area of a circle is A=πr². 
Since π is about 3.14 we can substitute that into the equation.
So A=3.14×r²
We can substitute the given radius for r.
A= 3.14 × 5²
When a number is squared, or has the two over it, we multiply it by itself. 
5 × 5= 25
A= 3.14 × 25
Simplify this and the area of the circle is about 78.5
A≈78.5
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