Solve the problem.135 students attended an assembly at Piper School. The student enrollment at the school is 180. What percentage of the students attended the assembly?
A. 75%
B. 55%
C. 65%
D. 80%
Answer: A
Mathematics
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Sketch the surface z = f(x,y).f(x, y) = 2 -x2 - y2
A. 
B. 
C. 
D. 
Mathematics
Calculate. Round to two decimal places if necessary.
A. 0.07 B. 0.7 C. 0.007 D. 7
Mathematics
Solve the equation. First simplify the expression by combining like terms.5(y + 4) = 6(y - 3)
A. {2} B. {-2} C. {38} D. {-38}
Mathematics
Combine like terms.-3x - 6.4y + 11.1x - 3.5y - 8.1x + 9.9y
A. 7.1x - 5.9y B. 7.1x + 5.9y C. 0 D. -7.1x + 5.9y
Mathematics