AnswersEA Academy Online Learning and Digital Citizenship Elective SpringManaging Projects Effectively

Managing Projects Effectively — Unit test Answers

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⇒ 4

Answer:

64014

2
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–32–16–8–4

A
–32
B
–16
C
–8
D
–4
3

Which is a solution to the equation?(x − 3)(x − 5) = 35

A
x = −8
B
x = −5
C
x = 2
D
x = 10
4

What is a solution to (x + 6)(x + 2) = 60?

A
x = −6
B
x = −4
C
x = 4
D
x = 12
5

What are the solutions to the quadratic equation 4(x + 2)2 = 36

A
x = −11 and x = 7
B
x = −7 and x = 11
C
x = −5 and x = 1
D
x = −1 and x = 5
6

What values of b satisfy 4(3b + 2)2 = 64?

A
b = and b = –2
Option A
B
b = 2 and b =
Option B
C
b = and b = 3
Option C
D
b = 2 and b =
Option D
7

Fiona is completing the square to solve the polynomial equation.x2 – 4x + 1 = 0

A
isolating the constant 1
B
adding 4 to both sides of the equation
C
isolating the second term, –4x
D
adding 1 to both sides of the equation
8

Heather is writing a quadratic function that represents a parabola that touches but does not cross the x-axis at x = –6. Which function could Heather be writing?

f
f(x) = x2 + 36x + 12
f
f(x) = x2 – 36x – 12
f
f(x) = –x2 + 12x + 36
f
f(x) = –x2 – 12x – 36
9

What are the solutions to m2 – 9 = 0?

m
m = –9 and m = 0
m
m = –3 and m = 3
m
m = –3
m
m = 9
10

Clara writes the equation (x – 13)(x + 8) = 196 to solve for the missing side length of a rectangle represented by the factor x + 8. What is the missing side length represented by x + 8 units of the rectangle?

A
7
B
15
C
20
D
28
11

Sergey is solving 5x2 + 20x – 7 = 0. Which steps could he use to solve the quadratic equation by completing the square? Select three options.5(x2 + 4x + 4) = –7 + 20x + 2 = 5(x2 + 4x) = 75(x2 + 4x + 4) = 7 + 205(x2 + 4x) = –7

Question illustration
A
5(x2 + 4x + 4) = –7 + 20
B
x + 2 =
C
5(x2 + 4x) = 7
D
5(x2 + 4x + 4) = 7 + 20
E
5(x2 + 4x) = –7
12

Between which two ordered pairs does the graph of f(x) = x2 + x – 9 cross the negative x-axis?Quadratic formula: x =

Question illustration
A
(–6, 0) and (–5, 0)
B
(–4, 0) and (–3, 0)
C
(–3, 0) and (–2, 0)
D
(–2, 0) and (–1, 0)
13

Solve x2 + 6x = 7 by completing the square. Which is the solution set of the equation?

Question illustration
A
{–7, 1}
B
(negative 3 minus StartRoot 10 EndRoot comma negative 3 + StartRoot 10 EndRoot)
C
(3 minus StartRoot 10 EndRoot comma negative 3 + StartRoot 10 EndRoot)
D
{1, 7}
14

A quadratic equation has zero real number solutions. Which could be the discriminant value associated with this equation?

A
–5
B
0
C
1
D
6
15

A quadratic equation of the form 0 = ax2 + bx + c has one real number solution. Which could be the equation?

A
0 = 2x2 – 4x + 1
B
0 = 2x2 – 5x + 3
C
0 = –2x2 – 4x – 2
D
0 = –2x2 – 3x – 1
16

Nylon is a “big” covalent molecule used to make backpacks. Which property of covalent compounds is most useful in making backpacks?

A
soft
B
brittle
C
low melting point
D
nonconductor of electricity
17

⇒ A

Answer:

A

18

What is the solution of the equation (4x + 3)2 = 18?

A
x = and x = –3
Option A
B
x = and x = 3
Option B
C
x = and x =
Option C
D
x = and x =
Option D
19

Solve x2 – 64 = 0. Isolate x2: x2 = 64 Apply the square root property of equality: Isolate the variable: x = x =

Answers:
Selection 1:8
Selection 2:–8
20

What are the solutions of the quadratic equation 49x2 = 9?

A
x = and x =
B
x = and x =
C
x = and x =
D
x = and x =

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