Simplify the expression by combining like terms.2x - 2y + 4 - 9x
A. -7x - 2y
B. -5xy
C. -7x - 2y + 4
D. -7x + 2y
Answer: C
Mathematics
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Find the flux of the vector field F across the surface S in the indicated direction.F = x5yi - zk; S is portion of the cone z = 4
between z = 0 and z = 1; direction is outward
A. - 
?
B. - 
?
C. - 
D. 
?
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Write the percent as a decimal.170%
A. 17 B. 0.17 C. 1.71 D. 1.7
Mathematics
Solve this equation.14z = -28
A. z = 28 B. z = -28 C. z = 2 D. z = -2
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Use the quadratic formula to solve the equation.x(4x + 1) = 2
A. 
, 
B. 
, 
C. 
, 
D. 
, 
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