Enter an algebraic expression for the word expression.
9 decreased by n
The expression is

9 - n

Step-by-step explanation:

could you make me brainliest if this helped? :)

answer: the angel abc is 30°,and the abc is a triangle where the angel bac is 90°

so ac is the half of 24=12ft,and from the pythagorean theorem we find ba

ba=√bc^2-ac^2=√576-144=√432=12√3ft

so bac is 12+12√3=12(1+√3)ft