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The answer is -2 you use the formula -b over 2a
A quadrant is the area that is divided into the x and y axes
The quadrants in which tan 
and cot are positive are I and III
<h3>How to determine the quadrants</h3>
The tangent of an angle is calculated as:
While the cotangent of the angle is calculated as:
The above equations mean that:
For the tangent and cotangent of an angle to be positive, then the sine and the cosine of the angle must have the same sign.
- In the first quadrant, the sine and the cosine angles are positive.
- In the third quadrant, the sine and the cosine angles are negative.
Hence, the quadrants in which tan and cot are positive are I and III
Read more about trigonometry ratios at:
brainly.com/question/8120556
The little tic marks on each of the triangle's sides are there to tell you that the sides are all equal, and therefore, yes, it is an equilateral triangle.
Since all the sides are equal, a geometry theorem tells us that all the angles are equal.
You may try to set the two expressions for the two angles equal to each other, but you will still be stuck.
Since all three angles are equal, and since there are a total of 180 degrees in a triangle, each angle has to be 60 degrees.
So to find y, set the expression for angle A equal to 60 and solve for y.
60 = 5y + 10
50 = 5y
10 = y
y = 10
