Answer: b) -0.625
<u>Step-by-step explanation:</u>
The formula for the z-score is:
Absolute value only removes the negative signs. Just multiply the numerator and the denominator
Answer:
-5 < x < 5
Step-by-step explanation:
|x| < 5
This can be split into two cases: x < 5 and -x < 5 because |x| could be either x or -x depending on whether x is positive, negative, or 0. Solving the second one we get x > -5 so the answer is -5 < x < 5.
Step-by-step explanation:
that means she spent 3months in Spain to learn Spanish while she spent 9months in colombia