monday, january 11, 2016 advanced algebra final exam study guide
TRANSCRIPT
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Friday, April 21, 2023
Advanced AlgebraFinal Exam Study Guide
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1
The middle value for an ordered set of data. It also represents the 50th percentile of the data set.
B. median
2
The median of the upper half of the data set, representing the 75th percentile of the data.
D. Third quartile
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3
The sum of all the values in a data set divided by the number of data values. Also called the average.
A. mean
4
The median of the lower half of the data set, representing the 25th percentile of the data.
C. First quartile
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What is the probability of landing on heads,when flipping a coin?
What is the probability of rolling a die andlanding on 2?
1
2
1
6
5
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Marcus spins the spinner 50 times and finds that the probability of landing on the letter B is ¼ . He spins the spinner 8 more times, landing on the letter B the first 7 spins. What is the probability of the spinner landing on B on the 8th spin?
1
4
5
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Classify the sampling method for each problem.
A startup company wants to do a survey to find out if people would produce its product. Company employees conduct the survey by asking 50 of its friends.
a.
An apparel company is coming out with a new line of fall clothes. In order to conduct a survey, it uses a computer to randomly select 100 names from its client list.
b.
Convenience Sample
Simple Random Sample
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Classify the sampling method for each problem.
A couple wants to get a dog for their 6 year old son. They want to find out what dogs are considered friendly for kids. So, they visit a dog shelter, which consists of the Irish Settler, Golden Retriever, and Labrador Retriever breeds.
c.
A school wants to gauge teacher morale. The school decides to survey every 10th person from their list of teachers.
d.
Stratified Sample
Systematic Sample
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A software company is testing whether a new interface decreases the time it takes to complete a certain task. In a random trial, Group A used the existing interface and Group B used the new one. The times in seconds are given for the members of each group.
Null Hypothesis:
The time it takes to complete a task is the
same for Group A and Group B.
Do you reject the null hypothesis?
Use box-and-whisker plots to representboth groups.
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A software company is testing whether a new interface decreases the time it takes to complete a certain task. In a random trial, Group A used the existing interface and Group B used the new one. The times in seconds are given for the members of each group.
Group A 9 12 12 13 14 14 15 16 16 17
Median14
Q1 Q3Min Max
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A software company is testing whether a new interface decreases the time it takes to complete a certain task. In a random trial, Group A used the existing interface and Group B used the new one. The times in seconds are given for the members of each group.
Group B 8 9 10 10 10 12 13 13 14 14
Median11
Q1 Q3Min Max
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A software company is testing whether a new interface decreases the time it takes to complete a certain task. In a random trial, Group A used the existing interface and Group B used the new one. The times in seconds are given for the members of each group.
Group B
Group A
Do you reject the null hypothesis. Yes. The graphs are very different.
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The graph is a normal distribution with a standard deviation of 6. What is the best estimate of the probability of the shaded area under the curve?
Note: Find the probability of the shaded area between 24 and 32.
Find the standard normal values (z) of 24 and 32.
For x = 24: For x = 32:
= mean = 20σ = 6Standard deviation
xz
m-=
s
240.67
6
20xz
m- -= =
s=
32
6
202
xz
m- -= = =
s
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The graph is a normal distribution with a standard deviation of 6. What is the best estimate of the probability of the shaded area under the curve?
Find the probability of the shaded area between 24 and 32.
Use the table to find the areas under the curve for all values less than z.
z = 0.67 (close to 0.5)Area isapproximately0.69
z = 2Area = 0.98
AnswerSubtract bothshaded areas0.98 – 0.69
= 0.29
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Find the zeros and x-intercepts for each function. Write the letter next to each graph that matches the equation.
2( ) ( 1) ( 3)P x x x A.
Zeros
x – 1 = 0
x – 3 = 0
x = 1
x = 3
x-intercepts
(1,0)
(3,0)
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Find the zeros and x-intercepts for each function. Write the letter next to each graph that matches the equation.
B.
Zeros
x + 2 = 0
x – 3 = 0
x = –2
x = 3
x-intercepts
(–2,0)
(3,0)
2 21( ) ( 2) ( 3)
12P x x x
9
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Find the zeros and x-intercepts for each function. Write the letter next to each graph that matches the equation.
C.
Zeros
x – 3 = 0
x + 2 = 0
x = 3
x = –2
x-intercepts
(3,0)
(–2,0)
( ) ( 3)( 2)P x x x x
x = 0 (0,0)
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Subtract
4x(x3 + 2 – 3x) – (–7x2 – x + 9x4)
4x4 + 8x – 12x2 – (–7x2 – x + 9x4)
4x4 + 8x – 12x2 7x2 x 9x4+ + –
–5x4 – 5x2 + 9x
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2x2
4x
3x
–5
8x3
–4
12x2 –16x
–10x2 –15x 20
8x3 + 2x2 – 31x + 20
(4x – 5)(2x2 + 3x – 4)
(Add matching colors)
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a3 – b3 = (a – b)(a2 + ab + b2)
Factor 8y3 – 27
Use difference of two cubes formula
a3 – b3
8y3 – 27
a =
b =
2y
3
2y 3 3
322y(2y)2= ( – )( + + )
= (2y – 3)(4y2 + 6y + 9)
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4x(x2 – x – 6) = 0
Solve the equation
4x(x + 2)(x – 3) = 0x + 2 = 0 x – 3 = 0
x = –2 x = 3
–6
–1
2 –3
4x3 – 4x2 – 24x = 0
4x = 0
x = 0
Use diamond methodto factor trinomial
(Factor GCF)
4 0
4 4
x
13
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4 2
5
5 4
24
x z
z x×
4 2
5
4
2
4
5x z
z x= ×
4 2
5
1
6
5x z
z x
5 1
6 1
x
z3
3
3
3
5
6
x
z
4 2
5 1
5 1
6
x z
z x
CircleLargest
Exponents
SubtractExponentsfor x and z
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1 7 ( 1)
2( 1) 3( 7)
x x x x
x x
2
2
6 7 3 21
2 2
x x x
x x x
- - -¸
- -2 26 7
2 2 3 21
x x x x
x x
1
2 3
x x
( 1)
6
x x
2
6
x x
15
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Let denominator equal 0Solve for x.
Vertical Asymptote
Horizontal Asymptote
y = 0
x2 – 1 = 0 (x + 1)(x – 1) = 0
x + 1 = 0 x – 1 = 0x = –1 x = 1
2
2( )
1
xf x
x
Numerator Degree smaller
Denominator Degree larger
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Let denominator equal 0Solve for x.
Vertical Asymptote
Horizontal Asymptote
x – 1 = 0+1 +1x = 1
None
2 2 15( )
1
x xf x
x
Numerator Degree larger
Denominator Degree smaller
1
16
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Let denominator equal 0Solve for x.
Vertical Asymptote
Horizontal Asymptote
y = 3
x2 – 9 = 0 (x + 3)(x – 3) = 0
x + 3 = 0 x – 3 = 0x = –3 x = 3
Numerator Degree equal
Denominator Degree equal
3
1y
2
2
3( )
9
x xf x
x
16
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Subtract thenumerators
206
232
206
114
x
x
x
x
4 11 (2 23)
6 20
x x
x
4 11 2 23
6 20
x x
x
2 12
6 20
x
x
2( 6)
2(3 10)
x
x
6
3 10
x
x
17
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123
5x
Solve
123
5x
12 3
5 1x
3(x – 5) = (12)(1)
3x – 15 = 123x = 27x = 9
Step 1A
Let denominator = 0
x – 5 = 0
x = 5
Step 1B
Endpointsx = 5x = 9
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Interval TestNumber
Test of Inequality
True / False
A
B
C
5 9
123
5x
Solve
Step 2 CA B
Step 3
2
611
–4 > 3 F
12 > 3 T2 > 3 F
Step 4 5 < x < 9
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Solve
3(x – 8) = (6)(1)
3x – 24 = 63x = 30x = 10
Step 1A
Let denominator = 0
x – 8 = 0
x = 8
Step 1B
Endpointsx = 8x = 10
63
8x
63
8x
6 3
8 1x
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Interval TestNumber
Test of Inequality
True / False
A
B
C
8 10
Step 2 CA B
Step 3
7
911
–6 < 3 T
6 < 3 F2 < 3 T
Step 4 x < 8
Solve6
38x
x > 10or
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Simplify each expression
ln e0.15t
ln e0.15t = 0.15t
3eln(x+1)
3(x + 1) = 3x+3
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log42 + 2log43 – log46
log4(2·9) – log46
log4(18) – log46log4(18÷6)
log4(3)
20
log42 + log432 – log46log42 + log49 – log46
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21Evaluate log
9489.
Use a calculator.
9log 489 =log489log9
9542.0
6893.2
82.2
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52log 3 4x
5log 3 2x Divide both sides by 2
Exponentiate each side23 5x
25
3x
Divide both sides by 3
22
3x = 25
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P(–3, 6) is a point on the terminal side of θ in standard position. Find the exact value of the six trigonometric functions for θ.
Step 1 Plot point P, and use it to sketch a right triangle and angle θ in standard position. Find r.
x2 + y2 = r2
(–3)2 + (6)2 = r2
9 + 36 = r2
45 = r2
245 = r
45 = r
9 5× = r
3 5 = r
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Step 2 Find sin θ, cos θ, and tan θ.
3, 6, 3 5=- = =x y r
2
5=
52
5 5= ×
2 5
25= 2 5
5=
1
5
-=
5
5
1
5
-= ×
1 5
25
-=
6
3=
-
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Step 3 Use reciprocals to find csc θ, sec θ, and cot θ.
3, 6, 3 5=- = =x y r
1csc
sinq= =
qr
y
1sec
cosq= =
qr
x
1cot
tanq= =
qx
y
3 5
6=
5
2=
3 5
3=
-5=-
3
6
-=
1
2=-
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Convert radians from radians to degrees.5
9
= 100°
1805 rad
raians
dian9 s
æ ö÷ç ÷ç ÷ç ÷çp
æ öp ÷ç ÷ç ÷ç øè øè
o
185
9
0p= ´
p
o 5 180
9 1= ´
o 900
9=
o
24
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Verify the identity.25
cscseccot
csc
cos
1
sin
cos
cscsin
1
csccsc
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Verify the identity.26
1csccoscsc 222
1sin
1
1
coscsc
2
22
1sin
coscsc
2
22
1cotcsc 22 22 csccsc
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Friday, April 21, 2023
Amplitude
1( ) sin(2 )
2g x x
1 12 2
Period2 2
2 2
1
–1
π
2π
27A
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Friday, April 21, 2023
Amplitude
Period2
–26π
12π
1( ) 2cos
3h x x
|2| = 2
2 211
33
= 6π
2 1 2 3 6
1 3 1 1 1
27B
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This problem involves daily profits for an amusement park.
Ticket sales were good until a massive power outage happened on Saturday that was not repaired until late Sunday.
The graph will show decreased sales until Sunday.
Identify the graph to represent the situation.
B
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This problem involves daily profits for an amusement park.
The weather was beautiful on Friday and Saturday, but it rained all day on Sunday and Monday.
The graph will show decreased sales on Sunday and Monday.
Identify the graph to represent the situation.
C
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This problem involves daily profits for an amusement park.
The graph will show decreased sales on Friday and Sunday.
Only of the rides were running on Friday and Sunday.
Identify the graph to represent the situation.
A
28
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f(x) = 2x and g(x) = 7 – x
Find g(f(4))
Step 1: Find f(4)
g(16) = 7 – 16
= 16
Step 2: Find g(16)
f(4) = 24
= –9
g(f(4)) = –9
Use g(x) = 7 – xUse f(x) = 2x
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Given the quadratic function h(t) = 2t2 – 8t + 5 ,verify that the points (0, 5), (3, –1), and (5,15) are on the graph of the function.
(0,5) 5 = 2(0)2 – 8(0) + 55 = 2(0) – 8(0) + 55 = 0 – 0 + 55 = 5
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(3,-1) -1 = 2(3)2 – 8(3) + 5-1 = 2(9) – 8(3) + 5-1 = 18 – 24 + 5-1 = -1
30
Given the quadratic function h(t) = 2t2 – 8t + 5 ,verify that the points (0, 5), (3, –1), and (5,15) are on the graph of the function.
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(5,15) 15 = 2(5)2 – 8(5) + 515 = 2(25) – 8(5) + 515 = 50 – 40 + 515 = 15
30
Given the quadratic function h(t) = 2t2 – 8t + 5 ,verify that the points (0, 5), (3, –1), and (5,15) are on the graph of the function.
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The piecewise function represents the distance that Jennifer traveled when competing in a 15.5 mile triathlon in hours. The equations representing each activity are listed above.
if 0 0.5
12 5.5 if 0.5 1.5
6 3.5 if 1.5 2
t t
d t t t
t t
Swimming
Biking
Running
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Swimming Points d = tt = 0 t = 0.5d = 0 d = 0.5
(0,0) (0.5 , 0.5)
Biking Points d = 12t – 5.5t = 0.5
t = 1.5d =12(0.5) – 5.50 = 0.5 (0.5 , 0.5)
(1.5 , 12.5)
if 0 0.5
12 5.5 if 0.5 1.5
6 3.5 if 1.5 2
t t
d t t t
t t
d =12(1.5) – 5.50 = 12.5
31
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Running Points d = 6t + 3.5t = 1.5
t = 2
d = 6(1.5) + 3.5 = 12.5(1.5 , 12.5)
(2 , 15.5)
if 0 0.5
12 5.5 if 0.5 1.5
6 3.5 if 1.5 2
t t
d t t t
t t
d = 6(2) + 3.5 = 15.5
31
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Swimming
Time = 0.5 – 0 = 0.5
Biking Time = 1.5 – 0.5 = 1
0.51
Running Time = 2 – 1.5 = 0.5
0.5
Distance = 0.5 – 0 = 0.5
0.5
Distance = 12.5 – 0.5 = 12
12
Distance = 15.5 – 12.5 = 3
3
31
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Graph the exponential function. Find the asymptote. How is the graph transformed from the graph of its parent function?
Parent Function:________
g(x) = 2x+4 – 3
Asymptote:_______
Transformation:
f(x) = 2x
y = –3
Shift down 3 unitsShift left 4 units
32A
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Graph the exponential function. Find the asymptote. How is the graph transformed from the graph of its parent function?
Parent Function:________
g(x) = 2x+4 – 3
Asymptote:_______
Transformation:
f(x) = 2x
y = –3
Shift down 3 unitsShift left 4 units
32A
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Graph the exponential function. Find the asymptote. How is the graph transformed from the graph of its parent function?
Parent Function:________
g(x) = –5x
Asymptote:_______
Transformation:
f(x) = 5x
y = 0
Reflect across x-axis
32B
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Graph the exponential function. Find the asymptote. How is the graph transformed from the graph of its parent function?
Parent Function:________
g(x) = –5x
Asymptote:_______
Transformation:
f(x) = 5x
y = 0
Reflect across x-axis
32B
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Graph the exponential function. Find the asymptote. How is the graph transformed from the graph of its parent function?
Parent Function:________
g(x) = e–x – 6
Asymptote:_______
Transformation:
f(x) = ex
y = –6
Shift down 6 unitsReflect across y-axis
32C
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Graph the exponential function. Find the asymptote. How is the graph transformed from the graph of its parent function?
Parent Function:________
g(x) = e–x – 6
Asymptote:_______
Transformation:
f(x) = ex
y = –6
Shift down 6 unitsReflect across y-axis
32C
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Graph the logarithmic function. Find the asymptote. How is the graph transformed from the graph of its parent function?
Parent Function:________
Asymptote:_______
Transformation:
f(x) = log x
x = –4
Shift down 2 unitsShift left 4 units
g(x) = log (x+4) – 2
33A
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Graph the logarithmic function. Find the asymptote. How is the graph transformed from the graph of its parent function?
Parent Function:________
Asymptote:_______
Transformation:
f(x) = log x
x = –4
Shift down 2 unitsShift left 4 units
g(x) = log (x+4) – 2
33A
![Page 62: Monday, January 11, 2016 Advanced Algebra Final Exam Study Guide](https://reader035.vdocuments.mx/reader035/viewer/2022062305/5697c0251a28abf838cd521a/html5/thumbnails/62.jpg)
Graph the logarithmic function. Find the asymptote. How is the graph transformed from the graph of its parent function?
Parent Function:________
Asymptote:_______
Transformation:
f(x) = log x
x = 0
Reflect across y-axis
g(x) = log (–x)
33B
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Graph the logarithmic function. Find the asymptote. How is the graph transformed from the graph of its parent function?
Parent Function:________
Asymptote:_______
Transformation:
f(x) = log x
x = 0
Reflect across y-axis
g(x) = log (–x)
33B