How do you find y in 4y-13+9(7)+42

4y + 92

Step-by-step explanation:

4y - 13 + 9(7) + 42 is the question

Do the brackets first so

9 x 7 = 63

becomes

4y - 13 + 63 + 42

collect like terms, so:

63 + 42 = 13 = 92

4y + 92 is the final answer because you cannot simplify it anymore

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

3x + 4y -25 =0 represents the amount of change sianna should recieve