Quiz about pre Summative 2 revision HW

Question 1

Which of the is a complex number?

Accepted Answer

All of them

Answer

2

Answer

4i

Answer

3 + 5i

Answer

none of them

Question 2

Simplify: i⁷²

Accepted Answer

1

Answer

i

Answer

-i

Answer

-1

Question 3

Simplify: (8 + 2i) + ( -2 - 3i)

Accepted Answer

6 - i

Answer

10 - i

Answer

10 + 5i

Answer

6 + 5i

Question 4

Simplify (8 + 2i) - (2 - 3i)

Accepted Answer

6 + 5i

Answer

22 - 28i

Answer

6 - i

Answer

10 + i

Question 5

Write in standard form: (5 + 3i)(5 - 3i)

Accepted Answer

34

Answer

16

Answer

25 - 30i + i²

Answer

24 - 30i

Question 6

What is the conjugate of 5 - 2i?

Accepted Answer

5 + 2i

Answer

-5 - 2i

Answer

5 - 2i

Answer

-5 + 2i

Question 7

Question 7.

Accepted Answer

D

Answer

A

Answer

B

Answer

C

Question 8

5(a + 6)

Accepted Answer

5a + 30

Answer

5a + 6

Answer

a + 30

Answer

5a - 30

Question 9

4(p - 6)

Accepted Answer

4p - 24

Answer

-4p - 24

Answer

4p + 24

Answer

4p + 24

Question 10

6(3x + 5) + 2x

Accepted Answer

20x + 30

Answer

20x + 5

Answer

20x + 11

Answer

5x + 30

Question 11

Simplify the expression: 2(x + 4) + 3(2x - 5)

Accepted Answer

8x - 7

Answer

8x + 4

Answer

5x + 23

Answer

-5x + 20

Question 12

Expand (x + 3) (x + 7)

Accepted Answer

x²+ 10x + 21

Answer

x²+ 10x + 10

Answer

x + 10x + 10

Answer

2x + 10

Question 13

Factor Completely:
x² - 36

Accepted Answer

(x + 6)(x - 6)

Answer

(x + 9)(x - 4)

Answer

(x - 6)(x - 6)

Answer

(x - 9)(x + 4)

Question 14

6m2 + 16m

Accepted Answer

2m(3m + 8)

Answer

2(3m² + 8m)

Answer

2m(3m - 8m)

Answer

not factorable

Question 15

Factor:
p² - 14p

Accepted Answer

p(p - 14)

Answer

p(1 - 14)

Answer

2p(p - 7)

Answer

p2(1-14)

Question 16

$$x^2-x$$

Accepted Answer

$$x(x-1)$$

Answer

$$(x+1)(x-1)$$

Answer

$$x(x-x)$$

Answer

$$(x-1)(x-1)$$

Question 17

Factor
x² + 11x + 24

Accepted Answer

(x + 8)(x + 3)

Answer

(x + 6)(x + 4)

Answer

(x + 10)(x + 2)

Answer

(x + 2)(x + 12)

Question 18

Factor:

b²+ 8b + 7

Accepted Answer

(b + 7)(b +1)

Answer

(b + 4)(b + 3)

Answer

(b + 6)(b + 1)

Answer

(b + 4)(b + 2)

Question 19

Factor completely:

3x² + 18x +15

Hint: Factor GCF first.

Accepted Answer

3(x + 5)(x + 1)

Answer

3(x² + 5x + 5)

Answer

(x + 5)(x + 1)

Answer

3(x - 5)(x - 1)

Question 20

Factor completely.
3x²- 9x -120

Accepted Answer

3(x - 8)(x + 5)

Answer

3(x + 8)(x - 5)

Answer

(3x + 8)(x - 5)

Answer

(3x - 8)(x + 5)

Question 21

$$\frac{4}{x+3}+\frac{7}{x+3}$$

Accepted Answer

$$\frac{11}{x+3}$$

Answer

$$\frac{11}{2x+6}$$

Answer

$$\frac{28}{x^2+6x+9}$$

Answer

$$\frac{11}{x^2+9}$$

Question 22

$$\frac{5x}{x-6}+\frac{1}{x-6}$$

Accepted Answer

$$\frac{5x+1}{x-6}$$

Answer

$$\frac{6x}{x-6}$$

Answer

$$\frac{5x}{x-6}$$

Answer

$$\frac{6x}{2x-12}$$

Question 23

Simplify the expression

Accepted Answer

3 / 10y

Answer

6x / 20xy

Answer

(6x+1) / (20xy)

Answer

3 / 20xy

Question 24

Simplify $$\frac{3r+1}{r+5}+\frac{r+9}{r+5}$$

Accepted Answer

$$\frac{2\left(2r+5\right)}{r+5}$$

Answer

$$\frac{2r+10}{r+5}$$

Answer

$$2$$

Answer

$$\frac{4r+10}{r+5}$$

Question 25

To add or subtract rational expressions we must have a _____________>

Accepted Answer

common denominator

Answer

greatest common factor

Answer

calculator

Answer

proportion

Question 26

$$\frac{10}{x-1}+\frac{7}{x+3}$$

Accepted Answer

$$\frac{17x+23}{\left(x+3\right)\left(x-1\right)}$$

Answer

$$\frac{3}{\left(x+3\right)\left(x-1\right)}$$

Answer

$$\frac{17x-4}{\left(x+3\right)\left(x-1\right)}$$

Answer

$$\frac{70}{\left(x+3\right)\left(x-1\right)}$$

Question 27

Simplify.

Accepted Answer

9

Answer

9(x+10)

Answer

x+10

Answer

x+9

Question 28

Simplify.

Accepted Answer

1/(n-7)

Answer

n-7

Answer

(n-6)/(n-7)

Answer

n-6

Question 29

Simplify.

Accepted Answer

(x+6)/(x-5)

Answer

(x+6)/(x+4)

Answer

(x+6)(x+4)

Answer

(x+6)

Question 30

Simplify.

Accepted Answer

7/(m-3)

Answer

(m+6)/(m-3)

Answer

7(m+6)

Answer

(m-3)

Question 31

$$Simplify:\ \ \frac{\left(x-7\right)\left(x+1\right)}{\left(x+7\right)\left(x-7\right)}$$

Accepted Answer

$$\frac{x+1}{x+7}$$

Answer

$$\frac{x-1}{x+7}$$

Answer

$$\frac{x-1}{x-7}$$

Answer

$$\frac{x+1}{x-7}$$

Question 32

Solve:
3(x - 2) = 18

Accepted Answer

8

Answer

6.7

Answer

4

Answer

-4

Question 33

8v - 4(v + 8) = 8

Accepted Answer

10

Answer

2

Answer

4

Answer

-4

Question 34

2x - 3 + 4x = 27

Accepted Answer

5

Answer

12

Answer

4

Answer

15

Question 35

5x - 4 + 2x = 3

Accepted Answer

1

Answer

2

Answer

3

Answer

4

Question 36

3x + 2(4x - 4) = 3

Accepted Answer

1

Answer

4

Answer

3

Answer

2

Question 37

2x + 3(5x - 7) = 47

Accepted Answer

x = 4

Answer

x = 1

Answer

x = 2

Answer

x = 3

Question 38

In the equation, y = mx + b, the letter b is the ___________.

Accepted Answer

y-intercept

Answer

x-intercept

Answer

slope

Answer

rate of change

Question 39

Which is the graph of y= -x + 2?

Accepted Answer

A

Answer

B

Answer

C

Answer

D

Question 40

What type of slope does the graph have?

Accepted Answer

Zero

Answer

Undefined

Answer

Negative

Answer

Positive

Question 41

Bob has $150 in his savings account and saves $40 per month. Which function models his savings?

Accepted Answer

y = 40x + 150

Answer

y = 150 + 40

Answer

y = 150x + 40

Question 42

Evaluate f(-4) for the function f(x)=3x²-5

Accepted Answer

f(-4) = 43

Answer

f(-4) = 139

Answer

f(-4) = -53

Answer

f(-4) = -149

Question 43

Give the x-intercept
3x + 8y = 24

Accepted Answer

(8, 0)

Answer

(0, 8)

Answer

(3, 0)

Answer

(0, 3)

Question 44

What is the y-intercept in the equation x + 2y = 4

Accepted Answer

(0, 2)

Answer

(0, 0)

Answer

(4, 0)

Answer

(2, 0)

Question 45

Find the slope of the line.

Accepted Answer

-1

Answer

-2

Answer

2

Answer

1

Question 46

Find the slope of the line that passes through the points (2, 4) and (6, 12)

Accepted Answer

2

Answer

1/2

Answer

-1/2

Answer

-2

Question 47

IR = V
(solve for R)

Accepted Answer

R = V/I

Answer

R = IV

Answer

R = I/V

Answer

R = V - I

Question 48

Make 'x' the subject of the formula:

Accepted Answer

x = by + v

Answer

x = yb - v

Answer

x = by - v

Question 49

Which expression represents the value of x in the equation:
dx + e = f

Accepted Answer

x = (f - e)/d

Answer

x = (f + e)/d

Answer

x = d/(e - f)

Answer

x = d/(e + f)

Question 50

Solve for x:

Accepted Answer

x = by + v

Answer

x = yb - v

Answer

x = by - v

Question 51

In the picture, what does the coordinate (0, -2), where the parabola crosses over the y-axis, represent?

Accepted Answer

the y-intercept

Answer

the x-intercept

Answer

the minimum

Answer

the axis of symmetry

Question 52

On a graph, the value of x at the point where the line crosses the x-axis. Represented on B by the points (-2, 0) and (2,0) and on A by the origin.

Accepted Answer

x-intercepts

Answer

y-intercepts

Answer

vertex

Answer

axis of symmetry

Question 53

Solutions of a quadratic equation are also called

Accepted Answer

All of the above

Answer

roots

Answer

x-intercepts

Answer

zeros

Question 54

If the discriminant of the quadratic equation is equal to 0, how many real solutions are there?

Accepted Answer

One

Answer

None

Answer

Two

Answer

Infinite

Question 55

If the discriminant of the quadratic equation is equal to 4, how many real solutions are there?

Accepted Answer

Two

Answer

None

Answer

One

Answer

Infinite

Question 56

Use the quadratic formula to find the solutions for

y = -x² - 5x + 12

Accepted Answer

Option B is correct

Answer

No Real Solution

Answer

C.

Answer

D.

pre Summative 2 revision HW

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