What is the center and the radius of a circle given by the equation x2 + y2 + 4x - 10y + 20 = 0?

1mile equals approximately 1.6 kilometers. which best approximates the number of miles in 6 kilometers?

Thales was an ancient philosopher familiar with similar triangles. one story about him says that he found the height of a pyramid by measuring its shadow and his own shadow at the same time. if the person is 5-ft tall, what is the height of the pyramid in the drawing?

At a kentucky friend chicken, a survey showed 2/3 of all people preferred skinless chicken over the regular chicken. if 2,400 people responded to the survey, how many people preferred regular chicken?