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nikklg [1K]
3 years ago
8

Find the value of x.

Mathematics
1 answer:
Vladimir79 [104]3 years ago
4 0

Answer:

x= 2√37

Step-by-step explanation:

First thing you want to do is find the length of the missing side where the the right angle is at. You can find that with the pythagorean theorem of the other triangle, since you are already given 2 sides.

Pythagorean Theorem

{a}^{2}  +  {b}^{2}  =  {c}^{2}

a=2

b=?

c=2√2

Plug in and solve for b.

2^2+b^2=(2√2)^2

4+b^2=8

b^2=4

b=2

Now use the pythagorean theorem again to find your x side.

a=2

b=12

c=?

2^2+12^2=c^2

4+144=c^2

148=c^2

c=√148

c=2√37

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<span>C=2 \pi r
</span><span>138.16=2 \pi r
</span>21.99= r
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The formula to find the area of a circle is A= \pi r^2

<span>A= \pi r^2
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2 years ago
A pyramid has a regular hexagonal base with side lengths of 4 and a slant height of 6. Find the total area of the pyramid.
Tanzania [10]

The total area of pyramid is 113.569 square units

The equation to find the total area of the pyramid is Total area = base area + lateral area.

<u>Solution:</u>

Given, A pyramid has a regular hexagonal base with side lengths of 4 and a slant height of 6.

<em><u>The total area of pyramid is given by:</u></em>

A=A_{b}+A_{l}   ---- eqn 1

Where,

A_{b} \text { is the base area and } A_{l} \text { is the lateral area }

<em><u>The area of base is given as:</u></em>

A_{b}=\frac{3 \sqrt{3}}{2} l^{2}

Where "l" is the side of hexagon.

Substituting we get,

\begin{array}{l}{A_{b}=\frac{3 \sqrt{3}}{2}(4)^{2}} \\\\ {=\frac{3 \sqrt{3}}{2} \times 16=3 \sqrt{3} \times 8} \\\\ {A_{b}=24 \sqrt{3}}\end{array}

<em><u>The lateral area is given as:</u></em>

A_{l}=3 b h

Where,

b: base of the triangle

h: height of the triangle

Substituting we get,

\begin{array}{l}{A_{l}=3 \times(4) \times(6)} \\\\ {A_{l}=72}\end{array}

Plugging in the values we found in eqn 1 we get,

A=24 \sqrt{3}+72

A = 113.569 square units

<em><u>Summarizing the results:</u></em>

The total area of pyramid is 113.569 square units approximately

The equation used to find total area of pyramid is Total area = base area + lateral area.

8 0
3 years ago
Help me with number 2 I need help fast with the right answer with showing work
Anvisha [2.4K]

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v = volume

r = radius

h = height.

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In this problem,

v = 1,356.48 in^3

r = 6 in

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Plug our numbers into the volume formula above.

1,356.48 in^3 = \pi(6^2)h

Divide both sides by \pi(6^2) to isolate variable h

12.0 = h

The height of the cylinder is 12.0 inches

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F(x) = x^2 - 99x-100
Lubov Fominskaja [6]

Answer:

it is a quadratic. (x-100)(x+1) answers are x=100 x=-1

I have no idea what you want

Step-by-step explanation:

4 0
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