Simplify. Write your answers in the form of a+bi, where a and b are real numbers.(3 + 6i)(7 + 8i)
A. -27 + 66i
B. 48i2 + 66i + 21
C. 69 + 18i
D. -27 - 66i
Answer: A
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Graph the pair of parametric equations with the aid of a graphing calculator.x = 5 cos 2t + 4 cos 6t, y = 5 sin 2t - 4 sin 6t, 0 ? t ? ?
A. 
B. 
C. 
D. 
Find an equation of the line satisfying the given conditions. Write the equation in standard form.Through (-3, -9); slope 4
A. x + 4y = -3 B. -4x + y = 3 C. x - 4y = 3 D. 4x - y = 3
Write the equation of the line with the given conditions.passing through (5, 2) and parallel to the line with equation 2x + y = 4
A. y = - 2x + 12
B. y = - 
x - 6
C. y = - 2x - 12
D. y = 2x - 12
Solve.A triangular piece of glass is being cut so that the height of the triangle is 4 inches shorter than twice the base. If the area of the triangle is 168 square inches, how long is the height of the triangle?
A. 24 in. B. 26 in. C. 28 in. D. 14 in.