Answer: 8
Step-by-step explanation:
The triangle shown in the image attached is a right triangle.
Therefore, to calculate the missing lenght of the triangle you can apply the Pythagorean Theorem, which is shown below:

Where <em>a</em> is the hypotenuse and <em>b</em> and <em>c</em> are the legs.
The problem gives you the value of the hypotenuse and the value of one leg. Therefore, you must solve for the other leg from
, as following:

Therefore, the lenght of the missing side is: 8
Add 18 to both sides to get:
px = 22
Then divide both sides by p to get:
x = 22/p
The answer is C.
It doesn't change because to add fractions, you need a common denominator. To find it, they multiplied 1/3 by 2 to make 2/6, to add to the 3/6.
To determine the fourth term, plug 4 into the equation;
There is nothing attached