Answer:
B. (-5/13, 12/13)
Step-by-step explanation:
The point at distance x from π in the clockwise direction is the reflection of point T across the y-axis. Hence the coordinates are the same, except that the sign of the x-coordinate is reversed.
The point of interest is (-5/13, 12/13).
The additive inverse of a number is important because it helps you to understand how to cancel terms for variables in equations and formulas.
Answer:
3x - 9
Step-by-step explanation:
We already have the expression 4x + 2x − 3x − 9. Now, we just have to add like-terms. This will give us 3x - 9.
Answer: Option D
D. $108
Step-by-step explanation:
We must calculate the expected cost per patient to use treatment method B.
The expected cost for a discrete random variable x is:

Where
is the cost associated with the probability 
In this case, the random variable x is represented by the cost of each treatment.
For treatment B there is a possibility that antibiotic 2 works, in that case the cost x would be $ 100 and 
There is also the possibility that it does not work, in this case the cost x would be $180 and the probability 
The expected cost is:
