A ladder 9m long reaches a point 9m below the top of a vertical flagstaff. From the foot of the ladder, the angle of elevation of the flagstaff is 60°. Find the height of the
flagstaff

The value √10 and √15 are plotted on the number line

What is the effect on the graph of the function f(x)=x when f(x) is replaced with -f(x)+4

Sophia wrote an equation to represent the revenue of a movie theater for one day. she let x represent the number of child tickets sold and y represents the nunver of adult tickets sold. if a child ticket cost $4, an adult ticket cost $6, and the total revenue for the daybwas $420, which equation could sophia use to represent the number of chikd and adult tickets that were sold?