Simplify the expression. Assume that all variables are positive when they appear.
A. -5x2
B. 11x2
C. 25x2
D. not a real number
Answer: A
Mathematics
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Graph the inequality.(x - 4)2 + (y + 3)2 ? 4
A. 
B. 
C. 
D. 
Mathematics
Solve the linear inequality. Graph the solution set on a number line, and express the solution using interval notation.2x + 3 < 11
A. (-?, 4]
B. (-?, 4)
C. (4, ?)
D. [4, ?)
Mathematics
Solve the equation.log6 (7x + 3) = log6 (7x + 2)
A. 
B. 0
C. 5
D. No solution
Mathematics
Solve the problem.Suppose that the radius r and volume V = 
?r3 of a sphere are differentiable functions of t. Write an equation that relates dV/dt to dr/dt.
A. 
= 4?r2
B. 
= 4?
C. 
= 
?r2
D. 
= 3r2
Mathematics