My last math question! I need help. I'm not good at math so I'm relying on who ever do this to do so correctly

Find the value of the variable and the length of each secant segment

What are the coordinates of the image of p for a dilation with center (0, 0) and scale factor 2

Which of the following are independent events? a) knowing that it is going to rain tomorrow, and bringing an umbrella to schoolb) knowing that you have to get up early tomorrow, and going to bed before 9 p. mc) knowing that it is going to rain tomorrow, and going to bed before 9 p. md) knowing that you have a test in school tomorrow, and studying thw night before