Calculate, if possible.(-2.3) + (-6.1) + (-5.6) + 10
A. 7.2
B. -4
C. 8.2
D. -11.8
Answer: B
Mathematics
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A discrete probability distribution for a random variable X is given. Use the given distribution to find the requested information.Find E(X).
A. 5.25 B. 7.92 C. 9 D. 9.6
Mathematics
Find the volume of the indicated region.the region that lies inside the sphere 
and outside the cylinder 
A. 
B. 
C. 
D. 
Mathematics
Write the sentences as a system of inequalities in two variables. Then graph the system.The sum of the x-variable and the y-variable is at most -4. The y-variable added to the product of 3 and the x-variable does not exceed 12.
A. x + y > -4
x + 3y > 12
B. x + y ? -4
x + 3y ? 12
C. x + y ? -4
3x + y ? 12
D. x + y ? -4
3x + y ? 12
Mathematics
Perform the indicated operation.(-7) ? (-8) ? (-10) ? (4)
A. -2247 B. 2247 C. -2240 D. 2240
Mathematics