1. Simplify each expression: 2 log49 - log23 2. none 3. 2 log49 - log23 = log481 - log23 = - log23 I get - log23 when it should just be log23. What did i do wrong? 1. Find the equation of the following circle: The circle that passes through the origin and has intercepts equal to 1 and 2 on the x- and y- axes, respectively. 2. none 3. I have no idea how to do this problem. 1. For the circle x2 + y2 + 6x - 4y + 3 =0, find: The equation of the tangent line at the point (-2,5). 2. xx0+yy0 = r2 3. I know that the center is (-3,2) and the radius is radical 10, but when i solve this problem I get the wrong answer. xx0+yy0 = r2 x(-2) + y(5) = r2 -2x +5y = 10 The answer should be x + 3y = 13. What did I do wrong? Thank You!!