Simplify.8a - 5a + a - 13
A. 3a - 13
B. 4a - 13
C. 3a + a - 13
D. 3a - 12
Answer: B
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Solve the problem.If f(x, y) = (4000ey)/(1 + 
/2) represents the population density of a planar region on Earth, where x and y are measured in miles, find the number of people within the rectangle -6 ? x ? 6 and -3 ? y ? 0.
A. 8000(1 - e-3) ln 
? 15,807
B. 8000(1 - e-3) ln 4 ? 10,538
C. 4000(1 - e-3) ln 4 ? 5269
D. 16,000(1 - e-3) ln 4 ? 21,076
Solve and graph. Write the answer in set-builder notation.x - 
> - 
A. 
B. 
C. 
D. 
Provide an appropriate response.
What is the domain and range of the equation in the graph?
A. domain: [-2,2], range [-2,2] B. domain: [-4,4], range [-4,4] C. domain: [-2,2], range [-4,4] D. domain: [4,-4], range: [-2,2]
Perform the operation and simplify.
?
?
Please enter the answer as a polynomial.
What will be an ideal response?