What is -17 + 12 + 15?​

Which basic geometric term has no width, no length, and no thickness? line b. point c. angle d. plane

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.

If tan2a=cot(a+60), find the value of a, where 2a is an acute angle