Ivan plans to reorganize the music on his mp3 players . he has 9 1/3 music of rock and hip-hop . after the change he is planning , he will have 2 4/5 times as many hours if rock and hip-hop music on his mp3 players . is ivan planning to add or remove rock and hiphop music from his mp3 players . explain how you know

Find three consecutive numbers such that the sum of one-fourth the first and one-fifth the second is five less than one-seventh the third

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.

Select all of the following expressions that are equal to 2.5.