Of the 420 students enrolled in basic math, only 30% are first year students. how many are first year students? how many are not?

126 are first years and 294 are not.

Step-by-step explanation:

We know that 30% students of 420 students are years. To find the first years we multiply 30% or 0.3 by 420 to get 126.

To find the students who are not first years we take the 420 total students and subtract 126 to get 294 or you can take the remaining 70% or 0.7 of 420 to get 294 which are not the first year students.

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

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