123 degrees and 3x degrees find the value of x

The mean of a set of data is -3.82 and its standard deviation is 2.31. find the z score for a value of 3.99.

What number should be added to both sides of the equation to complete this square? x^2-10x=7

There are 3232 forwards and 8080 guards in leo's basketball league. leo must include all players on a team and wants each team to have the same number of forwards and the same number of guards. if leo creates the greatest number of teams possible, how many guards will be on each team?