Evaluate the sum.
A. -232
B. 2635
C. -297
D. 2563
Answer: C
Mathematics
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Solve the problem.The force required to compress a spring varies directly as the change in the length of the spring. If a force of 18 pounds is required to compress a certain spring 4 inches, how much force is required to compress the spring 7 inches?
A. 21 pounds B. 10.3 pounds C. 35 pounds D. 31.5 pounds
Mathematics
Decide whether the graph opens up or opens down.f(x) = -x2 + 10x - 7
A. opens up B. opens down
Mathematics
Solve the inequality. Express your answer using interval notation. Graph the solution set.|x + 2| ? 0
A. (-?, 2) ? (2, ?)
B. (-?, -2) ? (-2, ?)
C. -2
D. (-?, ?)
Mathematics
The point 
lies in the plane 
.
Answer the following statement true (T) or false (F)
Mathematics