AnswersLUSD-Int Math 2A LT2 Rational and Irrational Numbers A-GUnit 2 Test

Unit 2 Test — Unit test Answers

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44

Which are the solutions of x2 = 19x + 1?

A
StartFraction 19 minus StartRoot 19 EndRoot Over 2 EndFraction comma StartFraction 19 + StartRoot 19 EndRoot Over 2 EndFraction
Option A
B
StartFraction 19 minus StartRoot 365 EndRoot Over 2 EndFraction comma StartFraction 19 + StartRoot 365 EndRoot Over 2 EndFraction
Option B
C
StartFraction negative 19 minus StartRoot 19 EndRoot Over 2 EndFraction comma StartFraction negative 19 + StartRoot 19 EndRoot Over 2 EndFraction
Option C
D
StartFraction negative 19 minus StartRoot 365 EndRoot Over 2 EndFraction comma StartFraction negative 19 + StartRoot 365 EndRoot Over 2 EndFraction
Option D
45

Which translation maps the vertex of the graph of the function f(x) = x2 onto the vertex of the function g(x) = x2 + 2x +1?

A
right 1 unit
B
left 1 unit
C
right 2 units
D
left 2 units
46

What number should be added to both sides of the equation to complete the square?x2 + 3x = 6

A
Option
Option A
B
(StartFraction 3 Over 2 EndFraction) squared
Option B
C
3
D
62
47

What value of c makes x2 + 6x + c a perfect square trinomial?

A
3
B
6
C
9
D
12
48

Which function in vertex form is equivalent to f(x) = x2 + 6x + 3?

A
f(x) = (x + 3)2 + 3
B
f(x) = (x + 3)2 − 6
C
f(x) = (x + 6)2 + 3
D
f(x) = (x + 6)2 − 6
49

Which are the solutions of x2 = –5x + 8?

A
StartFraction negative 5 minus StartRoot 57 EndRoot Over 2 EndFraction comma StartFraction negative 5 + StartRoot 57 EndRoot Over 2 EndFraction
Option A
B
StartFraction negative 5 minus StartRoot 7 EndRoot Over 2 EndFraction comma StartFraction negative 5 + StartRoot 7 EndRoot Over 2 EndFraction
Option B
C
StartFraction 5 minus StartRoot 57 EndRoot Over 2 EndFraction comma StartFraction 5 + StartRoot 57 EndRoot Over 2 EndFraction
Option C
D
StartFraction 5 minus StartRoot 7 EndRoot Over 2 EndFraction comma StartFraction 5 + StartRoot 7 EndRoot Over 2 EndFraction
Option D
50

What are the coordinates of the vertex of the function f(x) = x2 − 12x + 5?

A
(6, 31)
B
(−6, 31)
C
(6, −31)
D
(−6, −31)
51

Which statements are true about the graph of the function f(x) = x2 – 8x + 5? Select three options.

A
The function in vertex form is f(x) = (x – 4)2 – 11.
B
The vertex of the function is (–8, 5).
C
The axis of symmetry is x = 5.
D
The y-intercept of the function is (0, 5).
E
The function crosses the x-axis twice.
52

What are the coordinates of the vertex of the function f(x)=x2+10x−3?

A
(–5, –28)
B
(–5, 28)
C
(5, –28)
D
(5, 28)
53

Which are the solutions of the quadratic equation?x2 = 7x + 4

A
StartFraction negative 7 minus StartRoot 65 EndRoot Over 2 EndFraction comma StartFraction negative 7 + StartRoot 65 EndRoot Over 2 EndFraction
Option A
B
–7, 0
C
StartFraction 7 minus StartRoot 65 EndRoot Over 2 EndFraction comma StartFraction 7 + StartRoot 65 EndRoot Over 2 EndFraction
Option C
D
7, 0

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