The standard equation is y=ax^2+bx+k and the vertex way is y=a(x-h)(x-h)+x
so the coordinate for x is -b/2a, for your problem a=-4 b=-16 so the coordinate for x is -(-16)/(2*(-4))=-2. Now you have to replace x=-2 in your equation y=-4(-2)^2-16(-2)-11= 5.
The vertex is (-2, 5)
Answer:
115
Step-by-step explanation:
180-50=130
130/2=65
180-65=115
If it is : (x + 5) / 8 = 6
multiply both sides by 8, eliminating the 8 on the left side
x + 5 = 8 * 6
x + 5 = 48
x = 48 - 5
x = 43
if it is : x + (5/8) = 6
subtract 5/8 from both sides
x = 6 - 5/8
x = 48/8 - 5/8
x = 43/8 or 5 3/8
The vertex angle is defined as the angle opposite the base. It can be calculated by formula, 180° - 2B = A where, B=base angle and A=vertex angle.
The two sides of an isosceles triangle are congruent, which means they are the same length. The third side of an isosceles triangle is larger than the other two and is known as the base.
Every triangle has three angles that add up to a total of 180°. The base angles are the two angles located along the base of isosceles triangles. In isosceles triangles, the base angles are always congruent, or equal.
The vertex angle is defined as the angle opposite the base. The vertex angle is always greater than the sum of the two base angles. The vertex angle is always calculated by subtracting the base angles from 180°, using the general formula: 180° - 2B = A, where B represents the base angle and A represents the vertex angle.
Thus, vertex angle is defined as the angle opposite the base.
To learn more about isosceles triangle refer here
brainly.com/question/18933031
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Answer:
From my understanding the answer is te third choice.