In Triangle DEF, Angle D = x, Angle E = 3x, and Angle F = 5x, what is the measure of each angle? Select all. Angle D = 20 degrees
Angle D = 30 degrees
Angle D = 40 degrees
Angle E = 60 degrees
Angle E = 70 degrees
Angle E = 80 degrees
Angle F = 100 degrees
Angle F = 110 degrees
Angle F = 120 degrees

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Step-by-step explanation:

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i gotchu hold up ill comment the answer

Step-by-step explanation:

if the eqn of the parabola is f(x) = (x-4)(x+2), we need to mult. this out to find the coordinates of the vertex.

then f(x) = x^2 + 2x - 4x - 8, and f(x) = x^2 - 2x - 8.

one way in which you can find the vertex is to calculate x = -b / (2a).   here, that comes to

        )

x = = 1.   f(1) = 1^2 - 2(1) - 8 = - 9.   vertex is at (1, -9).

        2(1) 

find another point on the curve:   let x=0, for which y=-8.   then (0, -8) is on the curve.   plot the vertex and this point and draw a smooth parabola thru both.

hope this