Provide an appropriate response.Is the following solution to the equation 
correct? Explain.81x3 = 4x81x2 = 49x = 2 or -2x = 
or x = - 
What will be an ideal response?
This solution is not correct. In the dividing by the variable x in the first step, the solution x = 0 is lost. The equation should instead be factored as x(81x2 - 4) = 0, which yields the solution set 
. (Explanations will vary.)
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Multiply.(2x - 2)(x - 9)
A. x2 - 20x - 21 B. 2x2 - 20x + 18 C. x2 + 18x - 20 D. 2x2 - 21x + 18
Solve the problem.Find the mass of a thin triangular plate bounded by the coordinate axes and the line 
if 
.
A. 
B. 
C. 
D. 
Find the vertices of the hyperbola.(x + 2)2 - 81(y - 3)2 = 81
A. (-7, -3) and (11, -3) B. (9, 3) and (-9, 3) C. (-11, 3) and (7, 3) D. (-10, 4) and (8, 4)
If f is one-to-one, find an equation for its inverse.f(x) = -
, x ? 5
A. f-1(x) = 
, x ? 5
B. f-1(x) = -
, x ? 0
C. f-1(x) = 
, x ? 0
D. f-1(x) = 
, x ? 0