Brennan

1. Which of these situations involves dynamics rather than kinematics?

(Points : 1)

using a velocity vs. time graph to find the distance traveled

studying the net forces on objects

finding the time of travel from the velocity

finding the acceleration from a velocity-time graph

2. A student has just started pulling hard enough for a crate to start accelerating into motion. At that particular instant, what is the net force on the crate if the force of friction has magnitude 200 N and the applied force is 225 N?

(Points : 1)

25 N in the direction the student is pulling

25 N opposite to the direction the student is pulling

0 N

425 N in the direction the student is pulling

3. Which of these is not one of the four fundamental forces of nature?

(Points : 1)

strong nuclear force

weak nuclear force

gravity

friction

4. Each of the answers below involves some kind of force. Of these, which is an example of a force acting through a distance?

(Points : 1)

meteor falling to the earth

long rope holding an object off the ground

winch pulling a car out of a ditch

golf ball flying through the air after being hit by a golf club

5. Which of these forces is most similar to electrical forces?

(Points : 1)

weight of an object

force between two magnets

force that holds the parts of atomic nuclei together

force attracting the moon to the earth

6. Suppose you are seated motionless in a chair. What is the net force acting on you?

(Points : 1)

your weight

force that the chair exerts upward

force you exert on the chair

zero

Algebra 2 Help? 7 Questions?

1. Which expression is not a polynomial?

(Points : 3)

Option A: 9/5x+3

Option B: 5

Option C: 3x^3 + 5x - 4

Option D: 2x^-2

2. Use the polynomial to answer the question.

12x^3 + 5 - 5x2 - 6x2 + 3x3 + 2 - x

Which expresses the polynomial in standard form?

(Points : 3)

15x3 + 11x2 - x + 7

15x6 - 11x4 - x + 7

15x3 - 11x2 - x + 7

15x5 - 11x2 - x - 7

3. Use the expression to answer the question.

(5x2 - 4x + 5) - (3x2 - 6x + 2)

Which is equal to this expression?

(Points : 3)

2x2 - 10x + 7

2x2 - 2x + 3

2x2 + 2x + 3

15x2 - 10x + 7

4. Which is equal to (2x - 3)(5x + 4)?

(Points : 3)

10x2 - 12

10x2 + 23x +12

7x2 - 2x + 1

10x2 - 7x - 12

6. Use the polynomial to answer the question.

6a4 + 9a3 - 12a2

Which represents the polynomial in factored form?

(Points : 3)

3a2(2a2 + 3a - 4)

3a2(2a2 + 9a3 - 12a2)

3a2(3a2 + 9a3 - 12a2)

3a4(2a2 + 3a - 4)

7. Use the polynomial to answer the question.

36x2 - 25

Which represents the polynomial in factored form?

(Points : 3)

(18x - 5)(18x - 5)

(18x - 5)(18x + 5)

(6x + 5)(6x - 5)

(6x - 5)(6x - 5)

8. Use the polynomial to answer the question.

x2 - 9x + 20

Which represents the polynomial in factored form?

(Points : 3)

(x + 4)(x - 5)

(x + 4)(x + 5)

(x - 4)(x - 5)

(x - 4)(x + 5)

PLEASE HELP I'm SO CONFUSED :( Thank you so much...

1. Which expression is not a polynomial?

(Points : 3)

Option A: 9/5x+3

Option B: 5

Option C: 3x^3 + 5x - 4

Option D: 2x^-2

2. Use the polynomial to answer the question.

12x^3 + 5 - 5x2 - 6x2 + 3x3 + 2 - x

Which expresses the polynomial in standard form?

(Points : 3)

15x3 + 11x2 - x + 7

15x6 - 11x4 - x + 7

15x3 - 11x2 - x + 7

15x5 - 11x2 - x - 7

3. Use the expression to answer the question.

(5x2 - 4x + 5) - (3x2 - 6x + 2)

Which is equal to this expression?

(Points : 3)

2x2 - 10x + 7

2x2 - 2x + 3

2x2 + 2x + 3

15x2 - 10x + 7

4. Which is equal to (2x - 3)(5x + 4)?

(Points : 3)

10x2 - 12

10x2 + 23x +12

7x2 - 2x + 1

10x2 - 7x - 12

6. Use the polynomial to answer the question.

6a4 + 9a3 - 12a2

Which represents the polynomial in factored form?

(Points : 3)

3a2(2a2 + 3a - 4)

3a2(2a2 + 9a3 - 12a2)

3a2(3a2 + 9a3 - 12a2)

3a4(2a2 + 3a - 4)

7. Use the polynomial to answer the question.

36x2 - 25

Which represents the polynomial in factored form?

(Points : 3)

(18x - 5)(18x - 5)

(18x - 5)(18x + 5)

(6x + 5)(6x - 5)

(6x - 5)(6x - 5)

8. Use the polynomial to answer the question.

x2 - 9x + 20

Which represents the polynomial in factored form?

(Points : 3)

(x + 4)(x - 5)

(x + 4)(x + 5)

(x - 4)(x - 5)

(x - 4)(x + 5)

PLEASE HELP I'm SO CONFUSED :( Thank you so much...

3. Use the function to answer the question.

f(x) = 4|x + 1| - 6

What is the vertex of the graph of f(x)?

(Points : 4)

(-1, -6)

(-1, 6)

(1, -6)

(4, -6)

I'm confused

6. Which is the solution set of the given compound inequality?

7 > x + 5 or x 2 >(or equal to) 3

(Points : 4)

Option A: x [2, 5)

Option B: x (2, 5]

Option C: x (-Infinity, 2) U [5, infinity )

Option D: x (-Infinity, 3) (upside down U) [5, infinity )

7. Which conjunction or disjunction is equivalent to the given absolute value inequality?

|x + 5| < 18

(Points : 4)

x + 5 > 18 or x + 5 < -18

x + 5 > 18 and x + 5 < -18

x + 5 < 18 or x + 5 > -18

x + 5 < 18 and x + 5 > -18

I know this is terrible to ask 5 questions but I am SO confused...

1. Which expresses the inequality x > -2 in interval notation?

(Points : 3)

(-∞, -2]

(-2, ∞)

[-2, ∞)

(-∞, -2)

5. Which is the solution set of the compound inequality?

x + 2 > 3 and x + 2 < 5

(Points : 3)

Option A:

Option B:

Option C:

Option D:

6. Which conjunction or dis-junction is equivalent to the given absolute value inequality?

|x + 2| > 10

(Points : 3)

x + 2 > 10 and x + 2 < -10

x + 2 > 10 or x + 2 < -10

x + 2 < 10 or x + 2 > -10

x + 2 < 10 and x + 2 > -10

7. Which is the solution set to the inequality |x| < 3?

(Points : 3)

x < -3 or x > 3

x > -3 and x < 3

x < -3 and x < 3

x > -3 or x < 3

8. Which is the solution set of the inequality?

|2x + 3| < 5

(Points : 3)

Option A: x e (-infinity,5)

Option B: x e (-8,2)

Option C: x e (5, infinity)

Option D: x e (-4,1)

THANK YOU SO MUCH... i need this in the next 45 min. if you could explain why that answer is correct that would be great because i hate asking for help