Find the vertices and foci of the ellipse.
+ 
= 1
A. Vertices: (0, ±25); Foci: (0, ±20)
B. Vertices: (±25, 0); Foci: (±15, 0)
C. Vertices: (0, ±25); Foci: (0, ±15)
D. Vertices: (±25, 0); Foci: (±20, 0)
Answer: D
Mathematics
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Perform the indicated operations.The impedance in an antenna circuit is 400 ( cos 13.6° + j sin 13.6° ) ohms . Write this in exponential form.
A. 0.237 e400j B. 400 e13.6j C. 400 e0.237j D. 0.237 e13.6j
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Solve the following systems of linear equations using Gaussian elimination.
x + 2y + 2z = 7 6x + 11y + 9z = 35 x + y - 2z = -3
Mathematics
Tell whether the relation is a function.
A. Function B. Not a function
Mathematics
Evaluate the expression.
?
?
A. 
B. 
C. 
D. 
E. 
Mathematics