The Z-score is calculated by the formula below

Step 2: Substitute the given parameters in the formula

Hence, the z-score of a person who scored 145 on the exam is -0.5
If a is the number of events, then a = 1. Plugging in 1 for a in the equation

, you get

.
Total cost is $9.
Answer:
The answer to your question is: (2a - 1) / 4
Step-by-step explanation:




I’ve provided both the answer and explanation below! Hope this helps :)
Slope is generally showed by a variable, the variable can be represented by any letter. In this case the variable is represented by x
so the slope is the number that comes before the x, so the slope of this equation is -8
So your answer is A