+7z+12
x +4x+3
+4x+3
Multiply:

First combine like terms: 7z+18+9x then you can’t really multiply it

the balance is found at the link

step-by-step explanation:

an advantage of the standard deviation is that it increases as the dispersion of the data increases. e. the interquartile range is preferred when the data are not skewed or no have outliers. an advantage of the standard deviation is that it uses all the observations in its computation.