For problems 9-14 represent the system of equations with an augmented matrix. Solve the system by rewriting the matrix in reduced row echelon form.
A. 
B. 
C. 
D. infinitely many solutions
E. no solution
Answer: C
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Find the distance between the pair of points. Give your answer in exact form and where appropriate find an approximation to three decimal places.(-3, -4) and (7, 1)
A. 75
B. 75
? 129.904
C. 5
? 11.18
D. 5
Solve the problem.A building has an entry with the shape of a parabolic arch 92 feet high and 42 feet wide at the base. Find an equation for the parabola if the vertex is placed at the origin of the coordinate system.
A. y2 = -19.2x B. y2 = -4.8x C. x2 = -4.8y D. x2 = -19.2y
Let 
. Find the value of the function.
?
?
A. 
B. 
C. 
D. 
E. 
Solve the problem.A box with an open top is formed by cutting squares out of the corners of a rectangular piece of cardboard and then folding up the sides. If x represents the length of the side of the square cut from each corner, and if the original piece of cardboard is 13 inches by 7 inches, what size square must be cut if the volume of the box is to be 55 cubic inches? 
A. x = 5 in. B. x = 1 in. C. x = 3 in. D. x = 11 in.