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DochEvi [55]
2 years ago
12

help pls I have ask this one so many time and so many time I have gotten the wrong answer can some pls help me?

Mathematics
1 answer:
Veseljchak [2.6K]2 years ago
4 0

Answer:

52pi

Step-by-step explanation:

You need the area of the large grey circle, minus the white circle, plus the small grey

Large grey = 8^2 * pi = 64pi

White = 4^2 * pi = 16pi

Small grey = 2^2 * pi = 4pi

64pi - 16pi = 48pi, 48pi + 4pi = 52pi

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There are about 32 cups in a gallon.
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3 years ago
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Sara is working on a Geometry problem in her Algebra class. The problem requires Sara to use the two quadrilaterals below to ans
zloy xaker [14]
Part A:

Given a square with sides 6 and x + 4. Also, given a rectangle with sides 2 and 3x + 4

The perimeter of the square is given by 4(x + 4) = 4x + 16

The area of the rectangle is given by 2(2) + 2(3x + 4) = 4 + 6x + 8 = 6x + 12

For the perimeters to be the same

4x + 16 = 6x + 12
4x - 6x = 12 - 16
-2x = -4
x = -4 / -2 = 2

The value of x that makes the <span>perimeters of the quadrilaterals the same is 2.



Part B:

The area of the square is given by

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

The area of the rectangle is given by 2(3x + 4) = 6x + 8

For the areas to be the same

x^2+8x+16=6x+8 \\  \\ \Rightarrow x^2+8x-6x+16-8=0 \\  \\ \Rightarrow x^2+2x+8=0 \\  \\ \Rightarrow x= \frac{-2\pm\sqrt{2^2-4(8)}}{2}  \\  \\ = \frac{-2\pm\sqrt{4-32}}{2} = \frac{-2\pm\sqrt{-28}}{2}  \\  \\ = \frac{-2\pm2i\sqrt{7}}{2} =-1\pm i\sqrt{7}

Thus, there is no real value of x for which the area of the quadrilaterals will be the same.
</span>
7 0
3 years ago
Calculate the size of each interior angle of a regular polygon with 14 sides
Ierofanga [76]

Answer:

154.285

Step-by-step explanation:

The sum of the interior angles of a 14-gon = (14-2)*180 = 2,160 degrees. There are 14 vertexes (vertices) for a 14-gon. It is 'regular' so all these angles are equal. By dividing 2160 (sum of all angles) by 14 (total amount of angles) we can see how much each angle is worth. So the interior angle of each is 154.285 degrees.

4 0
3 years ago
A triangular flag has an area of 22 cm². Jon measures the height as 8 cm, what is the base length?
dedylja [7]
The base length is 5.5 cm.

Explanation:

Area of triangle = base x height x 1/2

Let b cm be the base length of the triangular flag.

22 = b x 8 x 1/2

22 x 2 ÷ 8 = b

b = 44 ÷ 8

b = 5.5
4 0
3 years ago
Reflect the shape A in the line
Ghella [55]

Answer:

(3,-3) (5,-3) (3,-6)

Step-by-step explanation:

I hope this helps!!

8 0
2 years ago
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