What is the equation of a line with the point of (-1,-3) and a slope of -3

Both the red and blue line segments stretch from the center of the circle to a point on the circle. the length of the blue segment is 5. how long is the red line segment?

The vet charges $45 for an office visit and $10 for each vaccination your dog needs. write an eaquation

Asailor is looking at a kite. if he is looking at the kite at an angle of elevation of 36and the distance from the boat to the point where the kite is directly overhead is 40 feet, how high is the kite?