The equation of a circle is given by (x + 3.5)^2 + (y - 2.82)^2 = 25. What is the x-coordinate of the center of the circle?

What term best describes a line and a point that lie in the same plane? a. congruent b. coplanar c. collinear d. equal

Me because some of question i don’t understand

Ade and abc are similar. which best explains why the slope of the line between points a and d is the same as the slope between points a and b?