PLEASE HELP IT'S ON A TEST! What is an equation of the line that passes through the point (2, 4) and is perpendicular to the line whose equation is y = 2x + 1?

The lines shown below are parallel. if the green line has a slope of -1, what is the slope of the red line?

Aman is 6 feet 3 inches tall. the top of his shadow touches a fire hydrant that is 13 feet 6 inches away. what is the angle of elevation from the base of the fire hydrant to the top of the man's head?

The total ticket sales for a high school basketball game were $2,260. the ticket price for students were $2.25 less than the adult ticket price. the number of adult tickets sold was 230, and the number of student tickets sold was 180. what was the price of an adult ticket?