The mean of a population being sampled is 64, and the standard deviation of 6. If the sample size is 50, the standers error of the mean is what?

Simplify the expression 10/11(22z) + (a+5) -1

Asap! i'm not good math and i'm lost.

Worth 100 points need the answers asap first row -x^2 2x^2 (x/2)^2 x^2 x is less than 2 x is greater than 2 x is less than or equal to 2 x is greater than or equal to 2 second row -5 -5/2 4 5 •2 is less than x& x is less than 4 •2 is less than or equal to x & x is less than or equal to 4 •2 is less than or equal to x& x is less than 4 •2 is less than x& x is less than or equal to 4