Answer:
D. (6,6)
Step-by-step explanation:
Given the system of two equations

1. Add these two equations:

2. Subtract these two equations:

Hence, the solution to the system is (6,6)
Answer:
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Step-by-step explanation:
The answer is less than or equal to -4. Because -4+8=4
Answer:
76
or 238.76 
Step-by-step explanation:
The volume of a cylinder is V = 
Here the radius is r =
= 
The height is given as 19 ft
Then plug in all the numbers into the equation
V = 