Exam 9: Systems and Matrices

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Solve the problem. -Find the dimensions of a rectangular enclosure with perimeter 34ft34 \mathrm { ft } and area 60ft260 \mathrm { ft } ^ { 2 } .

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The graph shows the region of feasible solutions. Find the maximum or minimum value, as specified, of the objective function. -objective function =7x+3y;= 7 x + 3 y ; minimum  The graph shows the region of feasible solutions. Find the maximum or minimum value, as specified, of the objective function. -objective function  = 7 x + 3 y ;  minimum

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Provide an appropriate response. -If the graphs of a system of two equations are a circle and a parabola, what are the possible numbers of solutions (with real coordinates) of this system?

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Find the partial fraction decomposition for the rational expression. - x2x2+6x+9\frac { x ^ { 2 } } { x ^ { 2 } + 6 x + 9 }

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Find the values of the variables for which the statement is true, if possible. - [00ab]=[0q42]\left[ \begin{array} { l l } 0 & 0 \\a & b\end{array} \right] = \left[ \begin{array} { r r } 0 & q \\4 & - 2\end{array} \right]

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A nonlinear system is given, along with the graphs of both equations in the system. Determine if the points of intersection specified on the graph are solutions of the system by substituting directly into both equations. - +=52 2y+3x=0  A nonlinear system is given, along with the graphs of both equations in the system. Determine if the points of intersection specified on the graph are solutions of the system by substituting directly into both equations. - \begin{array} { l }  x ^ { 2 } + y ^ { 2 } = 52 \\ 2 y + 3 x = 0 \end{array}

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Perform the operation or operations when possible. - [2x+7y7k2z3w+5v6m9n][5x4y3k5z8w+3v2m3n]\left[\begin{array}{r}2 x+7 y \\7 k-2 z \\-3 w+5 v \\6 m-9 n\end{array}\right]-\left[\begin{array}{r}-5 x-4 y \\-3 k-5 z \\-8 w+3 v \\2 m-3 n\end{array}\right]

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Determine the system of inequalities illustrated in the graph. Write inequalities in standard form. -Determine the system of inequalities illustrated in the graph. Write inequalities in standard form. -

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Solve the problem. -A company makes 3 types of cable. Cable A requires 3 black, 3 white, and 2 red wires. B requires 1 black, 2 white, and 1 red. C requires 2 black, 1 white, and 2 red. The company used 100 black, 110 White and 90 red wires. How many of each type of cable were made?

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Find the matrix product when possible. - [226][503]\left[ \begin{array} { l l l } - 2 & 2 & 6 \end{array} \right] \left[ \begin{array} { r } 5 \\ 0 \\ - 3 \end{array} \right]

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Find the partial fraction decomposition for the rational expression. - 4x2+2x+42(x249)(x1)\frac { 4 x ^ { 2 } + 2 x + 42 } { \left( x ^ { 2 } - 49 \right) ( x - 1 ) }

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Provide an appropriate response. -Fill in the blank to complete the statement. In order for a matrix to have a determinant, it must be ــــــــــــ matrix.

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Find the partial fraction decomposition for the rational expression. - 31x772x2+14x+20\frac { - 31 x - 77 } { 2 x ^ { 2 } + 14 x + 20 }

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Find the partial fraction decomposition for the rational expression. - 26x288x+76(x2)(2x3)2\frac { 26 x ^ { 2 } - 88 x + 76 } { ( x - 2 ) ( 2 x - 3 ) ^ { 2 } }

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Determine the system of inequalities illustrated in the graph. Write inequalities in standard form. -Determine the system of inequalities illustrated in the graph. Write inequalities in standard form. -

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Solve the problem. -A grain dealer sold to one customer 10 bushels of wheat, 8 of corn, and 5 of rye for $67.80; to another, 8 of wheat, 5 of corn, and 10 of rye for $67.90; and to a third, 5 of wheat, 10 of corn, and 8 Of rye for $69.00. What was the price per bushel for corn?

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Provide an appropriate response. -For a certain system of three linear equations, the solution set is {6,1,7}\{ 6,1 , - 7 \} , and D=17D = - 17 . Find the values of DX,Dy\mathrm { D } _ { \mathrm { X } } , \mathrm { D } _ { \mathrm { y } } , and DZ\mathrm { D } _ { \mathrm { Z } } .

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Use the Gauss-Jordan method to solve the system of equations. If the system has infinitely many solutions, give the solution with y arbitrary. - 3x+3y=9 2x+2y=6

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Provide an appropriate response. -You are graphing 2x2+3y2>52 x ^ { 2 } + 3 y ^ { 2 } > 5 . You have drawn the graph of 2x2+3y2=52 x ^ { 2 } + 3 y ^ { 2 } = 5 . What single point will allow you to determine the correct region?

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Solve the system. - 5x-4y-2z+1=0 15x-4y+4z-4=0 8y+2z-3=0

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