For the given quadratic equation, use the discriminant to determine the number and type of solutions.4x2 + 8x + 4 = 0
A. Two nonreal complex
B. Two real
C. One real
Answer: C
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Determine whether the given function satisfies Laplace's equation.f(x, y) = e-3y sin -3x
A. Yes B. No
Simplify the following by combining like terms.- 
x2 + 
x + 
- 
x2 + 
x - 
A. 
x2 + 
x - 2
B. - 
x4 + 
x2 + 
C. - 
x2 + 
x + 
D. 
x6 + 
Find the expected value.A car agency has found daily demand to be as shown in the table.
Find the expected number of customers.
A. 9 B. 12 C. 10 D. 2
Solve the system of equations.
A. x = 3z + 5, and y = z - 2, where z is any real number or {(x, y, z) |x = 3z + 5, and y = z - 2, where z is any real number} B. x = z - 2, and y = -3z - 5, where z is any real number or {(x, y, z) |x = z - 2, and y = -3z - 5, where z is any real number} C. x = -3z - 5, and y = z + 2, where z is any real number or {(x, y, z) |x = -3z - 5, and y = z + 2, where z is any real number} D. inconsistent