Perform the indicated operations and simplify the result. Leave the numerator and denominator in your answer in factored form.
A. x + 9
B. 
C. 
D. x - 9
Answer: C
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Express the number as the ratio of two integers.0.286286 . . .
A. 
B. 
C. 
D. 
Determine the real zeros of the polynomial and their multiplicities. Then decide whether the graph touches or crosses the x-axis at each zero.f(x) = 3(x - 2)(x - 6)4
A. -2, multiplicity 1, crosses x-axis; -6, multiplicity 4, touches x-axis B. 2, multiplicity 1, crosses x-axis; 6, multiplicity 4, touches x-axis C. 2, multiplicity 1, touches x-axis; 6, multiplicity 4, crosses x-axis D. -2, multiplicity 1, touches x-axis; -6, multiplicity 4, crosses x-axis
Pivot once about the circled element in the simplex tableau, and read the solution from the result. 
A. x3 = 5, x2 = -7, z = -10; x1, s1, s2 = 0 B. x3 = 10, x2 = 10, z = 7; x1, s1, s2 = 0 C. x3 = 10, x2 = 7, z = 10; x1, s1, s2 = 0 D. x3 = 5, x2 = -7, z = 10; x1, s1, s2 = 0
Make a change of variable, x = Py, that transforms the given quadratic form into a quadratic form with no cross-product term. Give P and the new quadratic form.Q(x) = 5
+ 8
+ 4x1x2
A.
P = 
; -9
- 4
B.
P = 
; 9y1 + 4y2
C.
P = 
; 9
+ 4
D.
P = 
; 9
+ 4