-x+3y=6 x+3y=18 elimination using addition and subtraction

Which of the following are parts of a sphere

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.

Which of the following circles have their centers on the x-axis? check all that apply.