17, 23, 39, 35 Find the 80th term

If 1/√5+1/√5+1=p+q√r , find the values of p, q and r

Solve x+3y=6 and 4x-6y=6 by elimination . show work !

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.