Find an equation of the line described. Through (4, -8), parallel to the x-axis
A. y = 4
B. y = -8
C. y = 4x - 8
D. x = -8
Answer: B
Mathematics
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Solve.For a hyperbolic mirror the two foci are 44 cm apart. The distance of the vertex from one focus is 6 cm and from the other focus is 38 cm. Position a coordinate system with the origin at the center of the hyperbola and with the foci on the y-axis. Find the equation of the hyperbola.
A. 
- 
= 5
B. 
- 
= 1
C. 
- 
= 5
D. 
- 
= 1
Mathematics
Simplify the expression. Assume all variables represent nonnegative real numbers.z1/2 ? z2/3 ? z5/7
A. z42/79 B. z1/4 C. z4/15 D. z79/42
Mathematics
Multiply.
?
?
A. -83.875 B. -86.775 C. 8.3875 D. 83.875 E. -8.3875
Mathematics
Perform the indicated operation. Write the answer in simplest form. If the answer is an improper fraction, write it as a mixed number.
A. 18
B. 22
C. 22
D. 18
Mathematics