<h3>4x-4+12=20°+35°</h3><h3>4x+8=55°</h3><h3>4x=55°-8</h3><h3>4x=47°</h3><h3>x=47÷4</h3><h3>x=11.75</h3><h3>x=12</h3>
<h2> or</h2>
<h3>4x-4=12</h3><h3>4x=12+4</h3><h3>4x=16</h3><h3>x=16÷4</h3><h3>x=4</h3>
please mark this answer as brainlist
Answer:
For the first question, 180 degrees equals to a half of the sphere. For the second question, you need 24 central meridians for a complete sphere, which are exactly the hours in a day.
Step-by-step explanation:
A sphere is basically a 3D circle. As a circle has 360 degrees, 180 degrees would be half of a circle. Imagine you are on a satellite over the north pole or the south pole and you have a way to cut the earth by the middle. You will get two halves of sphere.
About the second question, you may need to have in mind that a day is the time spent for the earth to rotate all 360 degrees over its own axis. British fellow, on XIX century, decided they were the center of the world. As previously, back in the days, some other people decided a day had 24 hours, they decided to draw this lines and divide the earth in 24 pieces, so they could knew which time was on every point their extense kingdom had. As I said, a circle has 360 degrees, (360 degrees)/(24 hours) equals to 15 degrees.
Answer:
$3.80 per book
Step-by-step explanation:
I divided 19 by 5 to get the price per book
Answer:
The length of the slant height of the square pyramid is 20 in.
Step-by-step explanation:
The lateral surface area of a regular pyramid is the sum of the areas of its lateral faces.
The general formula for the lateral surface area of a regular pyramid is
where 
represents the perimeter of the base and 
the slant height.
From the information given we know that:
- The lateral surface area of a square pyramid is 440 in².
- The area of the base is 121 in².
And we want to find the the slant height of the pyramid.
For this, we also need to know that the area of a square is given by 
, where <em>s</em> is the length of any side and the perimeter of a square is given by 
.
Applying the formula for the area of a square we can find the length of the side
The perimeter of the base is
Next, we can apply the formula for the lateral surface area and solve for the slant height.
The length of the slant height of the square pyramid is 20 in.
