Solve the equation.-6n - 3 = 21
A. n = 22
B. n = -18
C. n = 4
D. n = -4
Answer: D
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Write the given decimal as an infinite series, then find the sum of the series, and finally, use the result to write the decimal as a ratio of two integers.0.616161 . . .
A. 
B. 
C. 
D. 
Find the torsion of the space curve.r(t) = (cosh t)i + tj + (sinh t)k
A. ? = 0
B. ? = 
C. ? = - 
D. ? = - 
Multiply.(2x - 12)(2x + 12)
A. 2x2 + 48x - 144 B. 4x2 - 144 C. 4x2 - 48x - 144 D. 4x2 + 48x - 144
For the polynomial, list each real zero and its multiplicity. Determine whether the graph crosses or touches the x-axis at each x -intercept.f(x) = 
x(x2 - 3)
A. 
, multiplicity 1, touches x-axis;
-
, multiplicity 1, touches x-axis
B. 0, multiplicity 1, touches x-axis;
, multiplicity 1, touches x-axis;
-
, multiplicity 1, touches x-axis
C. 0, multiplicity 1, crosses x-axis;
, multiplicity 1, crosses x-axis;
-
, multiplicity 1, crosses x-axis
D. 0, multiplicity 1