The navigator on the ship uses a compass to draw a circle on a nautical chart to indicate the ship's position. The circle has a diameter of 14 centimeters. What is the circle's radius?

Which values of p and q result in an equation with exactly one solution? px-43=-42x+q choose all answers that apply: a) p=-43 and q=-43 b) p=42 and q=43 c) p=43 and q=−42 d) p=42 and q=42