Questions and Answers A2

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Questions and Answers

1.
Evaluate the given expression if x = 4, y = 8, w = -2 and z = 3.
o
(x-y)² + 5wz
A.
-14
o
B.
14
o
C.
44
o
D.
34

2.
Simplify 5x + 2y – 7x + y
Discuss

3.
Simplify 6(4x + 8y) + 2(3x – 6y)

4.
Simplify (4x² + 3x + 3) + (5x² – 13x – 8). Use ^ for powers ie. x^2 is x to the
second power.

5.
Simplify (-10x² – 4x + 8)- (6x² + 10x -3)

6.
Simplify -3xy(6xy³- 4xy + 7y²)
o
A.
-18x^2y^4 + 12x^2y^2 - 21xy^3
o
B.
-18x^2y^4 - 12x^2y^2 - 21xy^3
o
C.
3x^2y^4 - 7x^2y^2 + 4xy^3
o
D.
3x^2y^4 + 7x^2y^2 - 4xy^3

7.
Simplify 10squrt(162) - squrt(405) - squrt(200)

8.
o
A.
A
o
B.
B
o
C.
C
o
D.
D

9.
o
A.
A
o
B.
B
o
C.
C
o
D.
D

10.
Solve 24p - 12 = 50; p = _____, round to the nearest hundredth.

11.
Solve 5x - 23 = 56; x = ____, round to the nearest tenth.

12.
Solve- abs(x - 2) = 27, X = ____
o
A.
29
o
B.
25
o
C.
-25
o
D.
29, -25

13.
Find the value of f(6) if f(x) = -4x - 2.
o
A.
26
o
B.
-26
o
C.
24
o
D.
-24

14.
Find the slope of the line that passes through the pair of points (-3,-5) and
(7,5).In your answer type the number only.

15.
Write an equation in slope-intercept form for the line that satisfies the following
condition. Slope 3, and passes through (5,20).Use spaces between operation
symbols when typing your answer. Ex. y = 3x - 2

16.
Solve the system of equations.
o
x – y = 4 and y = 2x – 6
A.
X=2y=2
o
B.
X = -2 y = 2
o
C.
X = -2 y = -2
o
D.
X = 2 y = -2

17.
Solve the system of equations.
o
A.
X = 4.8 y = 3.0
2x + 5y = 12 and x – 3y = -2
o
B.
X = 2.4 y = 1.5
o
C.
X = 1.2 y = 0.75
o
D.
X = 7.2 y = 4.5

18.
Describe the system of equation as consistent and independent, consistent and
dependent, or none of these. 3x – 2y = 1 and 6x – 9y = 63
o
A.
Consistent and independent
o
B.
Consistent and dependent
o
C.
None of these

19.
Express the given number or expression in scientific notation. Round to the
nearest hundredth. 0.0000269074

20.
Factor 4xy – 3y – 40x + 30
o
A.
(4x - 3)(2y - 20)
o
B.
(12x - 9)(2y - 20)
o
C.
(y - 10)(4x - 3)
o
D.
Y(4x - 3) - 10(4x - 3)

21.
Factor 2x² + 3x – 9

22.
(5 + ί) + (6 - 12ί)
o
A.
11 + 11i
o
B.
11 - 11i
o
C.
30 - 72i
o
D.
11 + 13i

23.
(4 - 10ί) + (15 - 16ί)

24.
Solve: squrt(2x - 2) + 12 = 14x = ____ Type the number only for your answer.

25.
Solve: squrt(x - 3) + 6 = 15
o
A.
64
o
B.
84
o
C.
74
o
D.
34

26.
M + 5 < 4 or m + 2 > 9
o
A.
M > -1 or m< 7
o
B.
M . -1 or m > 7
o
C.
M < -1 or m > 7
o
D.
M > - 1 or m > 7

27.
Simplify sqrt(36x^12y^8)
o
A.
6x^6y^4
o
B.
6x^12y^8
o
C.
9x^12y^8
o
D.
9x^6y^4

28.
Express the product in Scientific notation. Round to the nearest hundredth and
use spaces between x, and no spaces before or after parenthesis or ^. (6.34 x
10^-3)(6.3 x 10^-5)

29.
Simplify squrt(-200x^8y^12)
o
A.
-10x^4y^6squrt(2)
o
B.
-10ix^4y^6squrt(2)
o
C.
10x^4y^6squrt(-2)
o
D.
10ix^4y^6squrt(2)

30.
Evaluate squrt(-300) x squrt(-400)
o
A.
Squrt(1200)
o
B.
20squrt(3)
o
C.
200isqurt(3)
o
D.
-200squrt(3)

31.
Simplify sqrt(200x^17y^24)
o
A.
10x^8y^12squrt(2x)
o
B.
10x^8y^12squrt(2)
o
C.
10y^12squrt(2x^17)
o
D.
10squrt(2x^17y^24)

32.
o
A.
A
o
B.
B
o
C.
C
o
D.
D

33.
o
A.
A
o
B.
B
o
C.
C
o
D.
D

34.
What is squrt(1344) divided by squrt(7)
o
A.
192
o
B.
32squrt(6)
o
C.
8squrt(3)
o
D.
Squrt(192)

35.
o
A.
A
o
B.
B
o
C.
C
o
D.
D

36.
o
A.
A
o
B.
B
o
C.
C
o
D.
D
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