Determine whether the function satisfies a Laplace equation.f(x, y, z) = 5x2 - 3y2 - 2z2
A. Yes
B. No
Answer: A
Mathematics
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Use the substitution formula to evaluate the integral.
A. - 
B. - 
C. 
D. - 
Mathematics
Solve the system by graphing.-5x - 3y = 64x - 5y = -2
A. (-1, -0.4) B. (-0.6, 0.9) C. (0.5, 0.4) D. (-0.4, -1)
Mathematics
Write the answer to the problem as an algebraic expression.A theater ticket for adults is a dollars and the price of a child's ticket is c dollars. If 13 adults and 40 children attend the theater one night, how much money did the theater make?
A. 13a + 40c dollars B. 40a + 13c dollars C. 520ac dollars D. 13c + ca dollars
Mathematics
Find different polar coordinates (r, ?) for the same point under the given conditions.
, r < 0 and 2? < ? < 4?
A. 
B. 
C. 
D. 
Mathematics