Find the equation of the parabola with the given focus and directrix.

A. x = y2
B. y = x2
C. y = -2x2
D. y = -8x2


Answer: B

Mathematics

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Solve the problem.Find sin (?), given that cos (?) =  and sin (?) > 0.

A.
B. - 
C.
D. - 

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Solve the system.   +  -  =    -  + 

/> = -  +  -  = 

A.
B. {(-2, 1, 7)}
C. {(-2, 1, -7)}
D.

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Determine whether the pair are two equivalent expressions, two equivalent equations, or neither.5x - 2 + 2x + 9 and 7x + 7

A. expressions B. equations C. neither

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Add.3.7 + 0.619 + 45

A. 49.319 B. 54.89 C. 8.819 D. 45.989

Mathematics