Determine whether the statement is true or false.The number -a is always a negative number.
A. True
B. False
Answer: B
Mathematics
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Solve the problem.Find the center of mass of the thin semicircular region of constant density 
bounded by the 
and the curve 
.
A. 
= 0, 
= 
B. 
= 0, 
= 
C. 
= 0, 
= 
D. 
= 0, 
= 
Mathematics
Solve the given system of equations algebraically.x2 + y2 = 36x2 - y2 = 36
A. x = 6, y = 0 B. x = 6, y = 0; x = -6, y = 0 C. x = 0, y = -6 D. x = 0, y = 6; x = 0, y = -6
Mathematics
Solve the problem.Jim drove 152 miles in 4 hours. If he can keep the same pace, how long will it take him to drive 760 miles?
A. 20 hr B. 30 hr C. 40 hr D. 608 hr
Mathematics
Add or subtract as indicated. Simplify if necessary.
+ 
+ 
A. 
B. 
C. 
D. 
Mathematics