algebra 2 benchmark review ms. cheung. standard 1.0 1) the absolute value of any number will always...
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![Page 1: Algebra 2 Benchmark Review Ms. Cheung. Standard 1.0 1) The absolute value of any number will always be positive, thus the equation |5 – 6m| > - 7 will](https://reader036.vdocuments.mx/reader036/viewer/2022062408/56649f315503460f94c4d1da/html5/thumbnails/1.jpg)
Algebra 2
Benchmark ReviewMs. Cheung
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Standard 1.0
1)
The absolute value of any number will always be positive, thus the equation |5 – 6m| > - 7 will always be true!!
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Standard 1.0
2)
627510 x 55510 x
55510 x 55510 x
9
455
x
x13
655
x
x
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Standard 2.03. Which order pair is the solution to the system of equations below?
207 yx
1642074 yy
1648028 yy168032 y
6432 y2y
Solve for xSubstitute for xDistributeCombine Like Term
Combine Like termSolve for y
6
2014
20)2(7
207
x
x
x
yx
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Standard 2.04. Which order pair is the solution to the system of equations below?
242
2028
yx
yx
Multiply 2 to equation 2
Add the two equations1
44
264
24
x
x
x
yx
428
2028
yx
yx
244 y 6y
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5) Ms. Cheung’s current phone plan is about to be expired. She has been offered two promotions from two different phone providers. AT&T provides a 500 minute plan at $30 with 40 cents per text message. T-Mobile provides a 500 minute plan at $40 with 30 cents per text message. If x represents the number of text sent and y is the total amount charge for both plans, how do you write a system of equations that model this situation?
Standard 2.0
xy
xy
3.040
4.030
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6) Gerardo wrote a matrix equation.
What is the solution to Gerardo’s equation?
Standard 2.0
6
20
21
34
y
x
62
2034
6
20
21
34
yx
yx
y
x
4 ,262
2034
yx
yx
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7) Jackie wrote a matrix equation.
What is the solution to Gerardo’s equation?
Standard 2.0
6
3
23
12
y
x
623
32
6
3
23
12
yx
yx
y
x
3 ,0623
32
yx
yx
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Standard 3.0
8)
234
234
723
835
nnn
nnn
234 152 nnn
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Standard 3.0
1414a
66 2
aa
14206 2 aa
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Standard 3.0
105
126 2
k
kk
10176 2 kk
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Standard 3.0
342486 3434 xxxx
11)
48x 312x 1
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Given a polynomial expression such that it has two factors of
A)B) C)D)
24503510 234 xxxx
).4( and )1( xx
).2( and )1( xx
).3( and )1( xx
).3( and )2( xx
).4( and )3( xx
441
6424 632
Standard 3.012)
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13) Which of the following represent the graph of ?23 i
Standard 5.0
A
D
C
B
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14. Kevin knows that . What will he get if he simplifies
A)B) C)D)
i 1
4 and 4
Standard 5.0
?16
4
i4
ii 4 and 4
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15. Jocelyn knows that . What will he get if he simplifies
A)B) C)D)
i 1
8 and 8
Standard 5.0
?64
8
i8
ii 8 and 8
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16. Jocelyn knows that . What will she get if he simplifies
A)B) C)D)
i 1
Standard 6.0
?252
i10
i5
i10
i5
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Standard 6.017)
2339
)3)(3(
iii
ii
)1(9
10
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Standard 6.018)
i
ii
32
523
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Standard 6.019)
ii
ii
43512
)43(512
i9
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Standard 8.0
20)
042 p 4 ,0 ,1 cba
)1(2
)4)(1(400 2 x 216 2
4 2or 2 xx
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Standard 8.0
21)
02556 2 xx 25 ,5 ,6 cba
)6(2
)25)(6(455 2 x 12600255 12
6255
12255
12255 or xx
12255
35
35 or xx
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22. Given the graph f(x)=ax2+bx+c. If a is negative, what would my graph look like?
A) A linear graph going upB) A linear graph going upC) A quadratic graph going upD) A quadratic graph going down
Standard 9.0
f(x)=ax2+bx+c is a Quadratic Equation since it has a power of 2.
Since a is negative, the graph will be going downward.
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23)
Standard 9.0
Vertex(-3, -2)
Vertex(2, 2)
From (-3, -2) to (2, 2)We get
)2 ,3(
)2 ,2(
2)2 3,(2
4) (5,
Positive 5, so it’s 5 unit to the right.
Positive 4, 4 units UP!!
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24)
Standard 9.0
Vertex(5, 1)
Vertex(-5, 1)
Both functions have the same coefficient: 3, both have the same shape.
Both functions are positive, so both vertices are minimum.
Both functions are positive, so their vertices are minimums.
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25) What is the minimum value of the function f(x)=x2 – 9?
A) – 9 B) – 3 C) 0D) 9
Standard 10.0
Minimum The lowest Point!Find the vertex!
X= - b/2aX = 0/2 = 0
y = 0 – 9= -9
The lowest Point!
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Standard 10.0
26)
X= - b/2aX = -6/2 = - 3
y=(-3)2+6(-3)+5= 9 – 18 + 5 = - 4
Vertex: ( - 3, - 4)
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Standard 24.0
27)𝐅𝐢𝐧𝐝 𝐟 (𝟐 )𝐛𝐲 𝐬𝐮𝐛𝐬𝐭𝐢𝐭𝐮𝐭𝐢𝐧𝐠𝐱=𝟐𝐢𝐧𝐭𝐨𝐟 (𝐱)
𝑔 ( 𝑓 (2 ))¿𝑔 (3 (2 )2−4)
¿𝑔 (12−4)
¿𝑔 (8)
-6
¿10
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Standard 24.0
28)
𝐒𝐮𝐛𝐬𝐭𝐢𝐭𝐮𝐭𝐢𝐧𝐠𝐠 (𝐱)𝐢𝐧𝐭𝐨𝐟 (𝐱)
𝑓 (𝑔 (𝑥 ))¿ 𝑓 (𝑥+3) S
¿ (𝑥+3)2−1
¿ 𝑥2+6 𝑥+9−1
¿ 𝑥2+6 𝑥+8
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Standard 24.029) Which of the following functions is the
inverse of f(x) = 3x – 2?
321
321
231
231
)(
)(
)(
)(
x
x
x
x
xf
xf
xf
xfA)
B)
C)
D)
𝐒𝐭𝐞𝐩𝟐 :𝐒𝐰𝐢𝐭𝐜𝐡 𝐱𝐚𝐧𝐝 𝐲 .𝐒𝐭𝐞𝐩𝟑 :𝐒𝐨𝐥𝐯𝐞𝐟𝐨𝐫 𝐲 .
𝐒𝐭𝐞𝐩𝟏 :𝐒𝐮𝐛𝐬𝐭𝐢𝐭𝐮𝐭𝐞𝐲 𝐟𝐨𝐫 𝐟 (𝐱 ) .
𝑓 (𝑥 )=3 x−2𝐒𝐭𝐞𝐩𝟏 :𝐒𝐮𝐛𝐬𝐭𝐢𝐭𝐮𝐭𝐞𝐲 𝐟𝐨𝐫 𝐟 (𝐱 ) .y=3 x−2𝐒𝐭𝐞𝐩𝟐 :𝐒𝐰𝐢𝐭𝐜𝐡 𝐱𝐚𝐧𝐝 𝐲 .x=3 y−2𝐒𝐭𝐞𝐩𝟑 :𝐒𝐨𝐥𝐯𝐞𝐟𝐨𝐫 𝐲 .+𝟐 +𝟐
x+2=3 y𝟑 𝟑𝑥+2
3=𝑦
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Standard 7.030) Rewrite the following exponents to positive
exponents.
24
52
3
2
)(
)(
yx
yxxf
y
xxfA)
B)
𝑓 (𝑥 )= 1
𝑥2 𝑦3
𝑓 (𝑥 )=𝑥2 𝑦2
𝑥4 𝑦5𝑥2 𝑦 3
𝑓 (𝑥 )= 1
𝑥2 𝑦3
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Standard 7.031) 𝐒𝐭𝐞𝐩𝟐 :𝐍𝐞𝐠𝐚𝐭𝐢𝐯𝐞𝐄𝐱𝐩𝐨𝐧𝐞𝐧𝐭
𝐒𝐭𝐞𝐩𝟑 :𝐒𝐢𝐦𝐩𝐥𝐢𝐟𝐲
𝐒𝐭𝐞𝐩𝟏 :𝐃𝐢𝐬𝐭𝐫𝐢𝐛𝐮𝐭𝐞𝐞𝐱𝐩𝐨𝐧𝐞𝐧𝐭
¿ 3𝑎2𝑏3𝑐− 2
𝑎− 3𝑏6𝑐3
¿ 3𝑎2𝑏3𝑎3
𝑏6𝑐3𝑐2
¿ 3𝑎5𝑏3
𝑏6𝑐5 𝐒𝐭𝐞𝐩𝟑 :𝐒𝐢𝐦𝐩𝐥𝐢𝐟𝐲
¿ 3 𝑎5
𝑏3𝑐5
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Standard 7.032) 𝐒𝐭𝐞𝐩𝟐 :𝐒𝐢𝐦𝐩𝐥𝐢𝐟𝐲
𝐒𝐭𝐞𝐩𝟏 :𝐅𝐚𝐜𝐭𝐨𝐫𝐢𝐳𝐞
¿𝑥(𝑥+4)𝑥+3
∙(𝑥+3)(𝑥−3)(𝑥+4)(𝑥−3)
¿ 𝑥
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Standard 7.033) 𝐒𝐭𝐞𝐩𝟐 :𝐍𝐞𝐠𝐚𝐭𝐢𝐯𝐞𝐄𝐱𝐩𝐨𝐧𝐞𝐧𝐭
𝐒𝐭𝐞𝐩𝟑 :𝐒𝐢𝐦𝐩𝐥𝐢𝐟𝐲
𝐒𝐭𝐞𝐩𝟏 :𝐃𝐢𝐯𝐢𝐝𝐞𝐬𝐰𝐢𝐭𝐜𝐡𝐭𝐨𝐌𝐮𝐥𝐭𝐢𝐩𝐥𝐲
¿ 20 𝑥− 4
27 𝑦2 ×15 𝑦−5
8 𝑥− 3𝐒𝐭𝐞𝐩𝟏 :𝐃𝐢𝐯𝐢𝐝𝐞𝐬𝐰𝐢𝐭𝐜𝐡𝐭𝐨𝐌𝐮𝐥𝐭𝐢𝐩𝐥𝐲
¿ 2027 𝑦 2𝑥4×
15 𝑥3
8 𝑦5𝐒𝐭𝐞𝐩𝟐 :𝐍𝐞𝐠𝐚𝐭𝐢𝐯𝐞𝐄𝐱𝐩𝐨𝐧𝐞𝐧𝐭
¿5
9 𝑦 2𝑥×
5
2 𝑦5
𝑥
5
2
59
𝐒𝐭𝐞𝐩𝟑 :𝐒𝐢𝐦𝐩𝐥𝐢𝐟𝐲
¿25
18𝑥 𝑦7
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Standard 7.034)
𝐒𝐭𝐞𝐩𝟐 :𝐒𝐢𝐦𝐩𝐥𝐢𝐟𝐲𝐒𝐭𝐞𝐩𝟏 :𝐅𝐚𝐜𝐭𝐨𝐫𝐢𝐳𝐞
¿4 (𝑥2−4)
2−𝑥
¿4 (𝑥+2)(𝑥−2)
2−𝑥-1
¿−4 (𝑥+2)
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Standard 22.035)
Strategy: Convert to decimal
=0.5 + 0.25+ 0.125 + 0.625 + …
=0.5 + 0.25+ 0.125 + 0.0625 + …
=0.9375
Closest to 1
How about
=
= =
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Standard 22.036)
Strategy:Substitute n=1, 2, 3, 4, 5 into the answer choice to see if the term generated is the same as the question= 4(1) = 4 ≠3 (first term)
1st term 2nd term3rd term 4th term5th term
n=1 n=2 n=3 n=5n=4
= 3+4(1) = 7 ≠3 (first term)
= 2(1)+1 = 3 ¿3 (first term)= 2(2)+1 = 5 ≠7 (second term)
= 4(1)-1 = 3 (first term) = 4(2)-1 = 7 (second term)= 4(3)-1 = 11 (third term) = 4(4)-1 = 15 (fourth term)= 4(5)-1 = 19 (fifth term)
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¿1525
Standard PS 1.0
37)Strategy: Identify Keywords
P(cm label & no labels)=P(cm label) P(no labels)
¿28
×1024
Multiply
No. of rulers with cm labels
Total No. of Rulers
No. of rulers without labels
One less ruler
5
3
1
21
8
14¿
14
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38)
Standard PS 1.0
Strategy: Identify Keywords
Not raining in San Francisco and not raining in Sydney
Multiply
P(not raining in SF & not raining in Sydney)=P(not raining in SF) P(not raining in Sydney)
¿ (1−80 % )×(1−30 % )¿20 %×70 %¿14 %
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39)
Standard PS 1.0Strategy: Identify Keywords
Green and green Multiply
P(green & green)=P(green) P(green)
¿26×
34
No. of green marble in 1st
bag
Total No. of Marbles in
1st bag
No. of green marbles in 2nd bag
Total No. of marbles in 2nd
bag
12
1
2
¿14
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40)
Standard PS 2.0
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41) Standard PS 2.0