Answer:
The answer is -5.
Step-by-step explanation:
Step 1: If you want to get the answer easier, you should use the number line way.
Step 2: If you don't know how to use a number line then go backwards from 18 until you have are done counting, for example;
17, 16, 15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0, -1, -2, -3, -4,<em><u> -5.</u></em>
Since -5 ( negative five ) is the 23 ( twenty-third ) number you counted back from, you are done counting and now you have gotten your answer of -5!
-rve9
The sets 
and
could be used to form a right triangle.
What is right triangle?
A right triangle, also known as a right-angled triangle, an orthogonal triangle, or historically a rectangled triangle, is a triangle with one right angle, meaning that its two sides are perpendicular. Trigonometry's foundation is the relationship between the right triangle's sides and other angles.
Since for the right triangle is a, b, c are three sides of a triangle, where c is the diagonal, then
Consider, the set (3, 5, 8)
Here, 3^2 + 5^2 ≠ 8^2.
Consider, the set (8, 9, 11)
Here, 8^2 + 9^2 ≠ 11^2
Consider, the set
Here, 
Consider, the set
Here, 
Hence, , could be used to form a right triangle.
To know more about the right triangle, click on the link
brainly.com/question/2437195
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Based on the shaded region, the value of x which makes this region a gnomon is x = 1.
<h3>What is value of x?</h3>
Based on the dimensions of the side that isn't shaded, and the dimensions of the side that is shaded, the value of x can be found as:
3/ 6 = (1 + 3) / (x + 6 + x)
1/2 = 4 / (6 + 2x)
6 + 2x = 4 / (1/2)
2x = 8 - 6
x = 2/2
x = 1
Find out more on shaded regions at brainly.com/question/9767762.
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Answer: 56,058.42696629213
