What is the name of the point at which the three altitudes of a triangle are concurrent?
A. incenter
B. circumcenter
C. orthocenter
D. centroid
Answer: C
Mathematics
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Simplify the expression.-3(3r + 1) - (8r + 2) - 5r + 3
A. -22r - 2 B. -22r + 4 C. 22r + 3 D. -6r + 2
Mathematics
Perform the indicated operation.
+ 2?
A. 
B. 
C. 
D. - 
Mathematics
By the year 2015 the world population will grow to
A. 5.1 billion. B. 7.2 billion. C. 10.6 billion. D. 6.1 billion.
Mathematics
Solve the problem.The area of a square is 81 square centimeters. If the same amount is added to one dimension and removed from the other, the resulting rectangle has an area 9 square centimeters less than the area of the square. How much is added and subtracted?
A. 12 cm B. 3 cm C. 4 cm D. 9 cm
Mathematics