Find the least common denominator for these two rational expressions.
x/x^2+2x+1. -5/x^2+6x+5

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18

7 is the median   7.875 is the mean

step-by-step explanation:

3,4,5,6,8,11,13,13