F a vertical parabola opens downward, has its vertex in the second quadrant, and y=ax2+bx+c is the equation of this parabola, which of the following can be true? Sketch a curve for each possible case. a>0, b<0, c>0

step-by-step explanation:

last option

step-by-step explanation:

given that δdef is right and isoceles,

assuming that side df is the hypotenuse means that de an ef are the other 2 sides that intersect at 90° and are of equal length.

because they are of equal length, we can say that they are congruent

because they intersect at 90°, their slopes must be opposite reciprocals.

only the last option satisfies these conditions.

step-by-step explanation:

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