The mean of 10 numbers is 4 when an eleventh number is added to the original 10 the new mean is seven. What was the eleventh number HELPP

On a coordinate grid, point p is at (4, 3) and point r is at (−2, −5). points q and s are a reflection of both points across the x-axis. what are the coordinates of q and s? q(−4, 3), s(2, −5) q(4, −3), s(−2, 5) q(−4, −3), s(2, 5) q(−4, 3), s(−2, 5) ; -; i can't figure it out, if someone can me with the answer, that would be nice

What is 1.5% of 120 or what number is 1.5% of 120

Is (root2 -2)^2 rational or irrational. show the steps and answer fast