The amount of money in Don's savings account may be modeled with the function y=4x^2−12x+100, where x represents the number of months that pass. A. Complete the square to rewrite the expression that defines the function. Explain the steps used to complete the square.
B. Identify the vertex of the function. Explain how you determined the vertex given the form of the expression derived in part A.
C. Explain the meaning of the vertex as related to the given context.

d (5 x (-20)) * (100 x (0.7))

step-by-step explanation:

5÷1/100 * -.7 *-20

copy dot flip

5*100 * -.7 *-20

rearrange

5*-20   * 100 *-.7

-100   *-70

7000

3

step-by-step explanation:

c. y = 1/4 x + 5

step-by-step explanation:

first, put the equation of the line on the graph into slope-intercept form

(y = mx + b):   y = -4x + 8

second, a perpendicular line has to have "an opposite/reciprocal slope" to the original slope. so, find the "m" value in your original equation (it's -4, right? )

original slope: m = -4   perpendicular slope: change the sign to its opposite and find the reciprocal ("flip" the number)

new slope is now positive (b/c the original slope was negative 4), and it's 1/4 (not the original slope of 4 or 4/1)

what level of math? also i don't need to be paid if i can you.