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Chapter 11: Q. 7 (page 755)
True or False
The identity matrix has properties similar to
those of the real number 1.
False.
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solve each system of equations. If the system has no solution, say that it is inconsistent
x + 4y - 3z = -8
3x - y + 3z = 12
x + y + 6z = 1
Verify that the values of the variables listed are solutions of the system of equations.
In Problems 5–24, graph each equation of the system. Then solve the system to find the points of intersection.
The perimeter of a rectangular floor is 90 feet. Find the
dimensions of the floor if the length is twice the width.
Two circles have circumferences that add up to and areas that add up to . Find the radius of each circle.
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