Answer: $2 or $9
Step-by-step explanation:
Revenue (R) = $1800 , x = 1100 - 100p
R = xp
1800 = (1100 - 100p)p substituted x with 1100 - 100p
1800 = 1100p - 100p² distributed p into 1100 - 100p
100p² - 1100p + 1800 = 0 added 100p² & subtracted 1100p on both sides
p² - 11p + 18 = 0 divided both sides by 100
(p - 2) (p - 9) = 0 factored quadratic equation
p = 2 p = 9 applied Zero Product Property to solve for p
