Answer: C
First you have to get rid of the 8 because it is a constant. -4-8=-12. Then, you multiply out the denominator to isolate the variable. This means -12*3=-36
The probability of the door opening within three attempts is the answer. C
Answer:The answer is A
Step-by-step explanation:
Answer:
or 5.83095
Step-by-step explanation:
Use the distance formula 
Make sure to round the answer appropriately if not asked for in square root form!!
Answer:
-4
Step-by-step explanation:
y=-4x-9
y=mx+b
m=slope