Simplify the algebraic expression.9a + 6 - 3a
A. 12a + 6
B. 12a
C. 6a + 6
D. -6a + 6
Answer: C
Mathematics
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Evaluate the iterated integral.
A. 
B. 2
C. 2?
D. 
Mathematics
Solve the problem.A piece of land is shaped like a right triangle. Two people start at the right angle of the triangle at the same time, and walk at the same speed along different legs of the triangle. If the area formed by the positions of the two people and their starting point (the right angle) is changing at 
then how fast are the people moving when they are 
from the right angle? (Round your answer to two decimal places.)
A. 12.50 m/s B. 0.40 m/s C. 0.20 m/s D. 0.80 m/s
Mathematics
Solve the equation for exact solutions.4 cos-1 x = ?
A. 
B. 
C. 
D. 
Mathematics
Solve.4x + 1 + 9x + 7 = 5x + 8x + 5
A. No solution B. x = 288 C. x = 0 D. Infinite number of solutions
Mathematics