Find the circumference of the circle and round to the nearest tenth

Which equation represents a circle with a center at (–3, –5) and a radius of 6 units? (x – 3)2 + (y – 5)2 = 6 (x – 3)2 + (y – 5)2 = 36 (x + 3)2 + (y + 5)2 = 6 (x + 3)2 + (y + 5)2 = 36

When a rectangle is dilated, how do the perimeter and area of the rectangle change?

How many solutions does the nonlinear system of equations graphed below have?