Sis the centroid of triangle xyz. what is the length of sw? 5 units 11 units 22 units 28 units

How do i simply this expression (quadratic formula basis) on a ti-84 or normal calculator?

If f(x)=x+7 and g(x)=1/x what is (fog)(x)

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.