Graph the region described by the inequality.2x + y ? 6
A. 
B. 
C. 
D. 
Answer: B
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Write the system in the form 
Then solve the linear system by computing 
with a calculator. Round numbers to the nearest tenth, as necessary.2.6x - 0.7y + 5.3z - 3.4w = 12.9 6.5y + 0.7w = -1.8 4.0z - 2.2w = 1.54.9x + 0.6w = 3.2
A. (2.2, 1.1, -6.4, -12.4) B. (-2.2, 1.1, -6.4, 23.3) C. (2.2, 1.1, 7.2, 12.4) D. (2.2, -1.1, -6.4, 7.6)
Solve the equation.
= 
A. {34}
B. 
C. 
D. {18}
Solve the problem.The number of visitors to a tourist attraction (for the first few years after its opening) can be approximated by 
where x represents the number of months after the opening of the attraction. Find the number of visitors 16 months after the opening of the attraction.
A. 210 visitors B. 66 visitors C. 90 visitors D. 54 visitors
Find the part.2
% of 8500 trees
A. 187 trees B. 19 trees C. 1870 trees D. 18,700 trees