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Aleksandr-060686 [28]
3 years ago
13

Solve for X. Help please!

Mathematics
1 answer:
nataly862011 [7]3 years ago
4 0

Answer:

C

Step-by-step explanation:

180-80=100

100+5x+10+6x+4=180

114+11x=180

11x=66

x=6

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lana66690 [7]
The reciprocal is B. 3/5
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The base of a solid right pyramid is a regular hexagon with a radius of 2x units and an apothem of units. A solid right pyramid
Xelga [282]

Answer:

6 x^2*\sqrt{3}

Step-by-step explanation:

The base of the pyramid we need to study is a hexagon.

Let's look at the attached image of an hexagon to understand how we are going to find the area of this figure.

Notice that an hexagon is the combination of 6 exactly equal equilateral triangles in our case of size "2x" (notice that the "radius" of the hexagon is given as "2x")

Therefore the area of the hexagon is going to be 6 times the area of one of those equilateral triangles.

We know the area of a triangle is the product of its base times its height, divided by 2: \frac{base*height}{2} = \frac{2x*height}{2}

We notice that the triangle's height is exactly what is called the "apothem" of the hexagon (depicted in green in our figure) which measures x\sqrt{3}, so replacing this value in the formula above for the area of one of the triangles:

\frac{2x*height}{2}= \frac{2x*x\sqrt{3} }{2}=x^2\sqrt{3}

Then we multiply this area times 6 to get the total area of the hexagon (6 of these triangles):

Area of hexagon = 6x^2\sqrt{3}

which is the last option given in the list.

5 0
3 years ago
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A circle is drawn within a square as shown.
Yakvenalex [24]

As it is shown in the figure, the length of the square's side  s  is also the length of the circle's diameter  d:

s = d = 28 in.


•  Computing the area of the square:

A₁ = s²

A₁ = 28²

A₁ = 28 × 28

A₁ = 784 in²          ✔


•  Computing the area of the circle:

A₂ = π × r²

A₂ = π × (d/2)²

A₂ = π × (28/2)²

A₂ = π × 14²

A₂ ≈ 3.14 × 14 × 14

A₂ ≈ 615.44 in²          ✔

—————

•  The area of the shaded portion is equal to the difference between the area of the square and the area of circle:

A = A₁ – A₂

A ≈ 784 – 615.44

A ≈ 168.56 in²    <———   this is the answer (1st option).


I hope this helps. =)

8 0
3 years ago
What is the least common multiple of 6 and 12? Enter your answer in the box.<br><br> no links please
NNADVOKAT [17]

Answer:

12

Step-by-step explanation:

2   | 6         ,        12

2   | 3          ,        6

3   | 3          ,         3    

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8 0
2 years ago
100 points , I need to know the answers to this
ElenaW [278]

Answer: number 3 is 10 and number 4 is 3.16

Step-by-step explanation:

its just finding the square roots and doing the operation that follows

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