Find the sum without the use of a number line.2 + (-18)
A. -20
B. 20
C. 16
D. -16
Answer: D
Mathematics
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Solve the problem.162 students attended an assembly at Piper School. The student enrollment at the school is 648. What percentage of the students attended the assembly?
A. 15% B. 30% C. 5% D. 25%
Mathematics
Perform the indicated operation and write your answer with positive integer exponents.
A. m + n B. m - n C. n - m D. -n - m
Mathematics
Solve the system of equations using matrices (row operations). If the system has no solution, say that it is inconsistent.
A. x = 27, y = 9, z = 6; (27, 9, 6)
B. x = -9, y = -9, z = 3; (-9, -9, 3)
C. x = 
y - 
z - 
, y is any real number, z is any real number
or 
D. inconsistent
Mathematics
Find the slope of the tangent line to the graph at the given point.f(x) = x2 + 5x at (4, 20)
A. 3 B. 13 C. 9 D. 21
Mathematics