When Preston won a contest, he got a silver medal with a radius of 4 centimeters. What is the medal's circumference?

Consider the line y = -3/-2 x +6. find the equation of the line that is perpendicular to this line and passes through the point (-9,-3). find the equation of the line that is parallel to this line and passes through the point (-9,-3).

What number should be added to both sides of the equation to complete this square? x^2-10x=7

Gretchen is setting up for a banquet. she has 300 chairs and needs to distribute them evenly among t tables. how many chairs should she put at each table? write your answer as an expression.