Evaluate.-5x2 for x = -12
A. -720
B. 120
C. 720
D. -120
Answer: A
Mathematics
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Find the center of mass of a thin plate of constant density covering the given region.The region bounded by y = x2 and y = 5
A. 
= 0, 
= 3
B. 
= 0, 
= 15
C. 
= 0, 
= 
D. 
= 0, 
= 6
Mathematics
Find the least common denominator.
, 
A. 2(x - 3)(x + 2) B. 2(x + 3)(x + 2) C. 2(x - 3)(x - 2) D. 2(x + 3)(x - 2)
Mathematics
Add.(5x3y3 + 3x2y2 - x2y + xy2 + 2x + 1) + (x3y3 - x2y2 + x2y + 2x - 2)
A. 6x3y3 + 4x2y2 + x2y + 4x - 1 B. 6x3y3 + 2x2y2 + xy2 + 4x - 1 C. 6x3y3 + 3x2y2 + x2y + 1 D. 6x3y3 + 2x2y2 + 2xy2 - 1
Mathematics
Solve the problem.Find two positive numbers whose sum is 56 and whose product is a maximum.
A. 28 and 42 B. 14 and 42 C. 28 and 28 D. 42 and 42
Mathematics