You plug in the equation of y into x. X+2(x-3)=18 Gives you the answer of, x = 8 Then you plug in x which is 8 Into the equation of y. So, y = 8-3 Which gives you Y = 5 The answer is X = 8 Y = 5
The distribution of a sample of the outside diameters of pvc pipes approximates a symmetrical, bell-shaped distribution. the arithmetic mean is 14.0 inches, and the standard deviation is 0.1 inches. about 68% of the outside diameters lie between what two amounts?