Find the standard equation of the sphere with the given characteristics. center: (-1, -7,3) radi radius: s

Reflect the point (7,0) across the y-axis

2x minus y equals 6, x plus y equals negative 3

White shapes and black shapes are used in a game. some of the shapes are circles. while the rest are squares. the ratio of the number of white shapes to the number of black shapes is 5: 11. the ratio of the number of white cicrles to the number of white squares is 3: 7. the ratio of the number of black circles to the number of black squres is 3: 8. work out what fraction of all the shapes are circles.