What value of x gives the minimum value of the quadratic function 
? Round your answer to two decimal places.
?
A. 2.66
B. 2.44
C. 1.27
D. 0.38
Answer: D
Mathematics
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Calculate the flux of the field F across the closed plane curve C.F = y3i + x2j; the curve C is the closed counterclockwise path formed from the semicircle 
0 ? t ? ?, and the straight line segment from (-2, 0) to (2, 0)
A. - 
B. 
C. 
D. 0
Mathematics
Find the focus and the directrix of the parabola.y = -2x2 - 20x - 53
A. Focus: 
; directrix: y = - 
B. Focus: (-5, -5); directrix: x = -1
C. Focus: (-5, -11); directrix: x = -5
D. Focus: 
; directrix: y = - 
Mathematics
Solve the linear system by using an inverse matrix.
A. {(-4, 3)} B. {(-3, 4)} C. {(3, -4)} D. {(4, -3)}
Mathematics
Perform the operations indicated. Write your answer in simplest form.- 
÷ 
A. - 
B. - 
C. 
D. 
Mathematics