What is the sum?
3/x^2-9 + 5/x+3
a) 8/x^2+x-6
b) 5x-12/x-3
c)-5x/(x+3(x-3)
d) 5x-12/x+3(x-3)

Sum  

D is correct

Step-by-step explanation:

Given:

We are given a rational expression and to add the expression.

First we make common denominator and then we add them

Multiply and divide the second fraction  by x-3

Now we have common denominator and write as common

Factor the denominator:

Hence, The sum  is  

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.

50

step-by-step explanation: