Factor by grouping.15x2 - 6xy + 10xy - 4y2
A. (3x - 2y)(5x - 2y)
B. (3x + 2)(5x - 2)
C. (15x + 2y)(x - 2y)
D. (3x + 2y)(5x - 2y)
Answer: D
Mathematics
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A function f(x), a point x0, the limit of f(x) as x approaches x0, and a positive number ? is given. Find a number 
such that for all x, 0 < 
< ? ? 
< ?.f(x) = 
, L = 3, x0 = 6, and ? = 1
A. 16 B. 5 C. 4 D. 7
Mathematics
Find all the second partial derivatives.f(x, y) = xy2 + yex2 + 5
A. 
= 2yex2; 
= 2x; 
= 
= 2xex2
B. 
= 2yex2; 
= 2x; 
= 
= 2y + 2xex2
C. 
= yex2(1 + 2x2); 
= x; 
= 
= y + xex2
D. 
= 2yex2(1 + 2x2); 
= 2x; 
= 
= 2y + 2xex2
Mathematics
1.3594 to the nearest thousandth
A. 1.359 B. 1.36 C. 1.358 D. 1.360
Mathematics
Solve the equation.0.8x - 0.4(80 + x) = -0.2(80)
A. {50} B. {20} C. {30} D. {40}
Mathematics