Do the operation and express the answer in 
form.
?
?
A. 
B. 
C. 
D. 
E. 
Answer: E
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Factor the polynomial using the negative of the greatest common factor.-10x2 - 15
A. -5(2x2 - 3) B. 5(-2x2 + 3) C. 5(-2x2 - 3) D. -5(2x2 + 3)
What fraction is represented by the shaded portion of the figure?
A. 
B. 
C. 
D. 
Find the domain and range and describe the level curves for the function f(x,y).f(x, y) = 7x2 - 2y2
A. Domain: all points in the x-y plane; range: all real numbers; level curves: ellipses 
B. Domain: all points in the first quadrant of the x-y plane; range: all real numbers; level curves: hyperbolas 
C. Domain: all points in the x-y plane; range: all real numbers; level curves: hyperbolas 
D. Domain: all points in the x-y plane; range: real numbers z ? 0; level curves: ellipses 
Provide an appropriate response.Which of the following are not allowable operations when the Gaussian elimination method is used to solve a system of linear equations?(i)A multiple of elements of one row may be added to the corresponding elements of any other row.(ii)Any two columns may be interchanged.(iii)The elements of any row may be multiplied by the corresponding elements of another row.(iv)All of the elements of any row may be multiplied by any nonzero number.
A. (i), (iv) B. (ii), (iii), (iv) C. (ii), (iii) D. (ii)