15. Find the length of segment DE of the triangle ABC.
1 answer:
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The answer is the option d, which is: d)
The explanation for this problem is shown below:
1. Smplify the denominator and rewrite the numerator in this form:
2. Multiply the denominator and the numerator by the conjugated and simplify the expression, as following:
3. As you can see, you obtain the expression shown in the option mentioned above.
Answer:
Axis of symmetry:
Vertex:
Step-by-step explanation:
The given quadratic equation is
By comparing to the general quadratic function;
We have a=4,b=5,c=-1
The equation of the axis of symmetry is given by the formula;
We got this formula by completing the square on the general quadratic function.
We substitute a=4 and b=5 to obtain;
is the axis of symmetry.
To find the y-value of the vertex, we put into the function to obtain;
The vertex of the given function is
Axis of symmetry:
Vertex:
Step-by-step explanation:
The given quadratic equation is
By comparing to the general quadratic function;
We have a=4,b=5,c=-1
The equation of the axis of symmetry is given by the formula;
We got this formula by completing the square on the general quadratic function.
We substitute a=4 and b=5 to obtain;
is the axis of symmetry.
To find the y-value of the vertex, we put
The vertex of the given function is