What are the coordinates of the center and length of the radius of the circle whose equation is x2 + 6x + y2 – 4y = 23?

In the sixth grade 13 out of 20 students have a dog if there are 152 sixth grade students how many of them have a dog

In the diagram, ab is tangent to c, ab = 4 inches, and ad = 2 inches. find the radius of the circle.

Apossible wavelength for the color blue is 0.000000492 meter. which of the following is a reasonable estimate for this wavelength for the color blue? a. 5 × 10-6 m b. 5 × 107 m c. 5 × 10-7 m d. 5 × 106 m