Find the equation of the tangent line to the curve when x has the given value.f(x) = -7 - x2; x = 9
A. y = 18x - 74
B. y = -18x + 74
C. y = -2x
D. y = 9x + 74
Answer: B
Mathematics
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Graph the parabola or ellipse. Include the directrix that corresponds to the focus at the origin.r = 
A. 
B. 
C. 
D. 
Mathematics
Solve.3(-15 + 
)2 = -13(-15 + 
) - 4
A. 
, 121, - 
, -121
B. 11, 
C. 
, 121
D. No solution
Mathematics
Simplify the expression. (Remember the order of operations.)[14 - (-15)] - [13 + (-5)]
A. 21 B. -11 C. -17 D. 17
Mathematics
Write the vector in the form 
A. 
B. 
C. 
D. 
Mathematics