What is the equation of the quadratic graph with a focus of (6, 0) and a directrix of y = −10? f(x) = −one twentieth (x − 6)2 + 5 f(x) = −one twentieth (x − 6)2 − 5 f(x) = one twentieth (x − 6)2 + 5 f(x) = one twentieth (x − 6)2 − 5

Last option is right

f(x) = one twentieth (x − 6)2 − 5

Step-by-step explanation:

Given that it is a quadratic equation

Hence a parabola

Focus = (6,0)

Directrix is y =-10

Since vertex lies exactly in the middle from focus to directrix we have

vertex = (6,-5)

The parabola is having axis perpendicular to directrix and hence axis is x =6

The parabola is open up since focus lies above the directrix.

So equation is

Hence last option is right

f(x) = one twentieth (x − 6)2 − 5

the answer is b.

step-by-step explanation:

by the trigonometric ratio tangent, tangent equals opposite divided by adjacent.

therefore, tan(50) equals ac/3

multiply each side by 3 to get: ac=3tan(50)

the answer is b.