Art galleries often price painting by the square inch if a painting measures 22.5 inches by 34 inches and costs $4.15 per square inch what is the selling price for the panting

$3174.75

Step-by-step explanation:

You take 22.5 and 34 and multiply them to find the square feet then you have to multiply that by the price per square foot.

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

muyb ajo

step-by-step explanation:

jegosu