Use the quadratic formula, x=−b±b2−4ac√2a, to solve the following equation. 5x2−9x−10=0 What are the solutions to the equation? Select all that apply.
x=−9+281√5
x=9+281√10
x=81−281√10
x=−9−281√5
x=9−281√10

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.