Quiz Unit 4 From My work from quiz 4 to 6 PDF

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Self quiz my work from 4 to 6. Haven't fix all though...

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The entire Self Quiz 1. Let f(x) = – x – 4, x < 0. What is f ? The correct answer is: –√(–x – 4), x < – 4 2. For f(x) = –√(x – 5) – 2, what is the domain of f ? The correct answer is: (–∞, –2] 3. If f(x) = 2x + 3 and g(x) = x – 5, what is f○g? The correct answer is: 2x – 7 -1 4. If f(x) = 2x + 3 and g(x) = x – 5, what is g ○ f? The correct answer is: 2x - 2 5. If f(x) = 2x + 3, and g(x) = x + x, what is f ○ g? The correct answer is: 2x + 2x + 3 6. Solve for x: (1/2) = 2 The correct answer is: -4 7. The half-life of carbon 14 is 5,730 years. How old is a bone that has 70% of its original carbon 14?

Choose the closest answer. The correct answer is: 3,000 years 8. What, approximately, is log 18? Choose the closest answer. The correct answer is: 3 9. Solve for x: 2 = (1/2) The correct answer is: 4 10. The best answer for x: ln (e ) = 3x – 2 is: The correct answer is: 4.0 11. What is the solution to 3x – y = 4, x + 6y = -5? The correct answer is: (1, -1) 12. Solve the system: x + y + z = 6, 2x – y + z = 3, x + y – z = 0 The correct answer is: (1, 2, 3) 13. Solve the system: y = x – 4, y = x – 6. The correct answer is: (5, –1), (8, 2) 14. Solve the system: y = x – 4, y = 3x – 6 The correct answer is: None of these 15. What kind of system is 2x + y = 3, -6x - 3y = -9? The correct answer is: Dependent 16. What is the domain of f(x) = √(x – 5) / √x (√ means “the square root of”)? The correct answer is: [5, ∞) 17. If f (t) = t2 + t, find [ f(t + h) – f (t)] / h. The correct answer is: 2t + h + 1 18. If A = (–2, 5) and B = [4,7], A ᴗ B? The correct answer is: (–2, 7] 19. If , find the average rate of change on the interval [−1, 2]. The correct answer is: 2 20.

Question 5

Correct Mark 1.00 out of 1.00

Find the range of f (x) = – 1 / √ (2 – x)

Select one: a. the empty set b. (–∞, 0) c. (0, ∞) d. (–2, ∞) e. (2, ∞)

Your answer is correct. The correct answer is: (–∞, 0)

What the equation of the line passing through (1, 4) and parallel to y = 2x + 1?

Select one: a.

y = 2x + 2

b.

y = 2x + 1

c.

y = 2x

d.

No such line exists.

e.

None of these.

What is the vertex of f(x) = x2 + 3x + 2?

Select one: a. 7 b. (0, 2) c. (-3/2, -1/4) d. -3/2 e. None of these

What is the equation of a line through (-1, 4) and (-2, 7)?

Select one: a. y = 3x + 1

b. y = -3x + 1 c. y = -3x + 7 d. y = 3x + 7 e. None of these

Find the value of x if a linear function goes through the following points and has the following slope: (x, 2), (−4, 6), m = 3.

Select one: a. 3/16 b. -3/16 c. -16/3 d. 16/3 e. None of these

What are the x-intercepts of f(x) = x2 – 6?

Select one: a. {6, -6} b. (0, -6) c. (6, 0) and (-6, 0)

d. (√6, 0) and (-√6, 0) e. There are no intercepts

If f(x) is a 4th degree polynomial, and has 3 complex numbers as roots, the other root is?

Select one: a.

0

b.

Real

c.

Complex

d.

1

e.

None of these

Your answer is incorrect. The correct answer is: Complex

If a = 2 + i, and b = 3 – 2i, what is a/b?

Select one: a. 13/4 + 13i/7

b. 13/4 – 13i/7

c. 4/13 + 7i/13 d. 4/13 – 7i/13

e. None of these

If f(x) is a 4th degree polynomial, and has 3 real numbers as roots, the other root is?

Select one: a.

0

b.

Real

c.

Complex

d.

1

e.

None of these

Your answer is correct. The correct answer is: Real

If a = 2 + i, and b = 3 – 2i, what is b/a?

Select one: a. 4/5 -(7/5)i b. 2 + (1/5)i

c.

10 – i

d.

10 + i

e.

Impossible

As x goes to minus infinity, the graph of f(x) = 5x4 – 173x3 – 16x2 – 7x – 15 goes to (points in) what direction?

Select one: a.

∞

b.

-∞

c.

0

d.

1

e.

5...