Perform the matrix row operation (or operations) and write the new matrix.
A. 
B. 
C. 
D. 
Answer: C
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Factor as completely as possible. If unfactorable, indicate that the polynomial is prime.20x2 + 31x + 12
A. (4x - 3)(5x - 4) B. prime C. (4x + 3)(5x + 4) D. (20x + 3)(x + 4)
Find an approximation of the area of the region R under the graph of the function f on the interval [a, b]. Use n subintervals and choose the representative points as indicated. Round to three decimal places.
?
; 
; 
; left end points
?
__________ sq units
Fill in the blank(s) with the appropriate word(s).
Solve the problem.Suppose that y is inversely proportional to x and that y = 26.4 when x = 6. Find the constant of proportionality k. Then use y = 
to find y when x = 36.
A. k = 4.4; y = 158.4 B. k = 176.4; y = 4.9 C. k = 146.4; y = 4.4 D. k = 158.4; y = 4.4
Solve the equation.9 - t = 21
A. 12 B. -12 C. -13 D. 31