You first work out the mean then for each number subtract the mean and square the result then work out the mean of those squared differences and take the square rot of that and you're done :)
Answer:
the answer is 70
Step-by-step explanation:
just do 6(-5)+100=70
hope this helps
X - 3y=0
3y - 6 =2x
__________
x - 3y=0 ........(1)
-2x + 3y=6 ........(2)
__________
-x = 6 ==》x = -6 .........(3) subst. in (2)
-2 (-6) + 3y = 6 ==》3y= -6 ==》y = -2