Two negative = one positive
-9 - (-9) = -9 + 9 = 0
your answer is 0
hope this helps
Answer:
z * sigma+u = x
Step-by-step explanation:
z = (x-u)/ sigma
z is the z score, u is the mean, sigma is the standard deviation
We need to solve for x
Multiply each side by sigma
z * sigma = (x-u)/ sigma * sigma
z * sigma = x-u
Add u to each side
z * sigma+u = x-u+u
z * sigma+u = x
Answer:
Step-by-step explanation:
isn't circumference the whole circle
and radius is the center from the outside