A sixth grade class is having a science fair. Here is the data for the total number of points
awarded to each of 6 projects: 78, 82, 90, 87, 89, and 85. A student was absent on the day
the project was due. The class mean is 84 including the score of the 7 th student who was
absent. What score did the absent student’s project receive?

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

the correct answer is a.) bc< mn 5 stars if this you : )

step-by-step explanation: