Math 112 Final Exam Study Aid Worksheet With Answer Key Page 21

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Math 112
Final Exam Study Aid
21 of 39
2
67. Write f (x) = 3x
+ 60x
1 in standard form. The SUM of the x and y coordinates of
the vertex is:
(A) 291
(B)
311
(C) 311
(D)
291
(E) None of these
2
68. Find the vertex of the quadratic function y = x
+ 2ax + b. The y -coordinate of the
vertex is:
2
b
2
2
(A) b
(B)
b
(C)
b
(D)
a
+ b
(E) 3a
+ b
2
4a
2
69. How many x-intercepts does the graph of the function k(x) = x
24x + 159 have?
(A) Zero
(B) One
(C) Two
(D) Three
4
16
2
70. Find the vertex of the quadratic function f (t) =
t
t + 3.
7
7
The y-coordinate of the vertex is:
1
5
6
(A)
(B)
(C)
(D) 1
(E) None of these
2
7
7
71. Find the equation of the parabola that has a vertex of (3, 1) and passes through the
2
point (4, 1). The coefficient of x
is a number:
(A) between
2 and
0.5
(B) between
0.5 and 1.5
(C) between 1.5 and 3
(D) between 3 and 4.5
(E) None of these

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