At the beginning of the year, Nolan had $100 in savings and saved an additional $10 each week thereafter. Bella started the year with $40 and saved $20 every week. Let N
N represent the amount of money Nolan has saved
t
t weeks after the beginning of the year and let
B
B represent the amount of money Bella has saved
t
t weeks after the beginning of the year. Graph each function and determine the amount of money Nolan and Bella have saved in the week that they have the same amount of money saved.

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

square root

step-by-step explanation: