Find the equation of the lines passing through the origin and perpendicular to the lines represented by x²-2xy + y² +5x-2y+1=0. When the general equation of second degree becomes circle? Use it to change the equation x²-5xy + y² +5x-2y+1=0 into the circle. Also find the length of tangent to the circle from the point (3,-3).​

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