The equation f(x)=x^2−12x+45 models the number of books y sold in a bookstore x days after an award-winning author appeared at an autograph-signing reception. How many books were sold after 4 days? Keep the answer as a whole number.

a; x = 0.5

step-by-step explanation:

-10x = -5

x = 0.5

the correct answer is 1: 2

step-by-step explanation:

hope this your welcome : )

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)

his first public project he is asked to create a small scale drawing. the garden is a right triangle with base 25m and height 30m. are you trying to solve for the last side/hypotenuse? the irrational form of the answer would be 5\sqrt{61}