Select the graph of the quadratic function 
. Identify the vertex and axis of symmetry.
?
A. ?
?
Vertex: (0, -3)
Axis of symmetry: y-axis
?
B. ?
?
?
Vertex: (0, -5)
Axis of symmetry: y-axis
C.
?
?
Vertex: (0, -2)
Axis of symmetry: y-axis
D. ?
?
?
Vertex: (0, -1)
Axis of symmetry: y-axis
E. ?
?
?
Vertex: (0, -4)
Axis of symmetry: y-axis
Answer: A
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Add or subtract as indicated. Simplify the result if possible. If an answer is an improper fraction, write it as a mixed number.11 - 
A. 8
B. 11
C. 10
D. 10
Find the solution set of the linear system. Identify inconsistent systems and dependent equations. For dependent equations, write your answer as an ordered triple in terms of z.
A. {(4, 1, 2)} B. {(4, 2, 1)} C. {(1, 4, 2)} D. {(1, 2, 4)}
Determine whether the statement is true or false.In the simplex method for a canonical linear programming problem, if all entries in the bottom row to the left of the vertical line are nonnegative, then the solution is optimal.
A. True B. False
Solve.In one week, Manisha worked 30.25 hours walking dogs and earned $259.25, including tips. How much did Manisha earn per hour? Round to the nearest cent if necessary.
A. $8.57 B. $8.55 C. $8.67 D. $8.59