3x-2= 4x- 6 -x+7 =6x – 14 2x + 5 =45 3•(-3x – 5)=4•(10 – 5x) 6x = 4x + 8 x +5x - 9 =3(2x-3)
-(x+1) + 8x = 5x – 9 x +5x - 9 =3(2x-3) 15-2x = 90
0,6(x+2) –(0,4x-0,6) = 0,2(1 - x) 4•(x – 1) + 1 =3•(2x +1) 3x –7=14 - 4x
3• (a+2)-1 =2•(a+3)+a 2 - (a - 3)=3•(a - 2)- 4a 2 - (a - 3)=3•(a - 2)- 4a

help!!!

With a height of 68 in, george was the shortest president of a particular club in the past century. the club presidents of the past century have a mean height of 73.2 in and a standard deviation of 1.3 in.a.what is the positive difference between george's height and the mean? b.how many standard deviations is that [the difference found in part (a)]? c.convert george's height to a z score.d.if we consider "usual" heights to be those that convert to z scores between -2 and 2, is george's height usual or unusual?