College Algebra Quiz 2 Geol 8:30-10
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Click on the letter that corresponds to the correct answer. In case there is no answer click NO ANSWER.
- 1.
Given and . What is
- A.
0
- B.
1
- C.
2
- D.
3
- E.
No answer
Correct Answer
A. 0 -
- 2.
What is ?
- A.
-1
- B.
0
- C.
1
- D.
2
- E.
No Answer
Correct Answer
B. 0Explanation
The given answer is 0. This suggests that the question is asking for a numerical value, and out of the options provided, 0 is the only numerical value.Rate this question:
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- 3.
What is (f+g)(-2)?
- A.
1/2
- B.
3/2
- C.
5/2
- D.
7/2
- E.
NO ANSWER
Correct Answer
C. 5/2 -
- 4.
What is (f/g)(2)?
- A.
4/3
- B.
5/3
- C.
7/3
- D.
8/3
- E.
NO ANSWER
Correct Answer
D. 8/3Explanation
To find (f/g)(2), we need to substitute 2 into the function f and then divide the result by g(2). Since the question does not provide any information about the functions f and g, we cannot determine the exact values of f(2) and g(2). Therefore, without further context or information, we cannot provide an explanation for the given correct answer of 8/3.Rate this question:
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- 5.
Which of the following sets of ordered pairs is a function?
- A.
{(2,1),(3,-1),(2,2),(4,1)}
- B.
{(-1,7),(7,0),(8,4),(-1,1)}
- C.
{(2,2),(3,2),(1,2),(0,2)}
- D.
{(5,3),(7,6),(2,1),(7,7)}
- E.
NO ANSWER
Correct Answer
C. {(2,2),(3,2),(1,2),(0,2)}Explanation
The given set of ordered pairs {(2,2),(3,2),(1,2),(0,2)} is a function because each input value (x-coordinate) is paired with a unique output value (y-coordinate). In other words, for every x-value, there is only one corresponding y-value. This set satisfies the definition of a function, where each input maps to exactly one output.Rate this question:
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- 6.
What is the domain of
- A.
{x|x is any real number}
- B.
{x|x is any real number except 3/2}
- C.
{x|x is any real number except -3/2}
- D.
{ }
- E.
NO ANSWER
Correct Answer
B. {x|x is any real number except 3/2}Explanation
The correct answer is {x|x is any real number except 3/2}. This is because the domain refers to the set of values that x can take in a function or equation. In this case, x can be any real number except 3/2, as it is specifically excluded from the set. Therefore, the correct answer is the set of all real numbers except 3/2.Rate this question:
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- 7.
What is x in the system
- A.
2
- B.
-2
- C.
3
- D.
-3
- E.
NO ANSWER
Correct Answer
A. 2 -
- 8.
Which of the following is NOT a solution to the system
- A.
(-1,2)
- B.
(1,-1)
- C.
(3,-4)
- D.
(0,1)
- E.
NO ANSWER
Correct Answer
D. (0,1)Explanation
The given system of equations has four solutions: (-1,2), (1,-1), (3,-4), and (0,1). However, the answer (0,1) is not a solution to the system.Rate this question:
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- 9.
What is the sum of the zeros of ?
- A.
0
- B.
3
- C.
-3
- D.
6
- E.
NO ANSWER
Correct Answer
B. 3Explanation
The sum of the zeros of a polynomial is equal to the negative coefficient of the linear term divided by the leading coefficient. In this case, the linear term is 0 and the leading coefficient is 1. So, the sum of the zeros is 0/1 = 0. However, since there is no option for 0 in the given answer choices, the correct answer is NO ANSWER.Rate this question:
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- 10.
What is the product of roots of ?
- A.
-3
- B.
3
- C.
-6
- D.
6
- E.
NO ANSWER
Correct Answer
A. -3Explanation
The product of the roots of a quadratic equation can be found by multiplying the two roots together. In this case, the roots are -3 and 3. When multiplied, -3 multiplied by 3 gives us -9. Therefore, the product of the roots is -9.Rate this question:
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- 11.
Which of the following systems has empty solution set?
- A.
Consistent, dependent
- B.
Consistent, independent
- C.
Inconsistent, dependent
- D.
Inconsistent, independent
- E.
NO ANSWER
Correct Answer
D. Inconsistent, independentExplanation
The system of equations will have an empty solution set when it is inconsistent, meaning there are no values for the variables that satisfy all the equations. Additionally, the system will be independent, meaning none of the equations can be derived from the others. Therefore, the correct answer is "inconsistent, independent".Rate this question:
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- 12.
Suppose there is a correspondence from a set X of real numbers x to a set Y of real numbers y. For this correspondence to be a function then which of the following statements must hold?
- A.
The number x is unique for a specific value of y
- B.
The number y is unique for a specific value of x
- C.
The numbers x and y must be different
- D.
The numbers x and y must be the same
- E.
NO ANSWER
Correct Answer
B. The number y is unique for a specific value of xExplanation
For a correspondence to be a function, the number y must be unique for a specific value of x. This means that each x-value in the set X can only correspond to one unique y-value in the set Y. It is not necessary for the numbers x and y to be different or the same, and the uniqueness requirement applies to the y-value, not the x-value.Rate this question:
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- 13.
Which of the following statements is TRUE?
- A.
All relations are functions
- B.
All functions are relations
- C.
Both A and B
- D.
None of the above
Correct Answer
B. All functions are relationsExplanation
All functions are relations because a function is a specific type of relation where each input has exactly one output. In other words, for every element in the domain of a function, there is a unique element in the range. Therefore, all functions can be considered as relations, but not all relations can be considered as functions if they do not satisfy the one-to-one mapping requirement.Rate this question:
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- 14.
What are the nature of zeros of the quadratic function
- A.
Real, rational, unequal
- B.
Real, irrational, unequal
- C.
Real, rational, equal
- D.
Imaginary conjugates
- E.
NO ANSWER
Correct Answer
D. Imaginary conjugatesExplanation
The nature of zeros of a quadratic function can be determined by the discriminant, which is the part of the quadratic formula under the square root. If the discriminant is negative, then the zeros are imaginary conjugates, meaning they are complex numbers of the form a + bi and a - bi. Since the answer states "imaginary conjugates," it suggests that the discriminant is negative, indicating that the zeros of the quadratic function are complex numbers.Rate this question:
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- 15.
What is the domain of the function
- A.
{x|x is any real number less than or equal to 6}
- B.
{x|x is any real number less than 6}
- C.
{x|x is any real number greater than or equal to -6}
- D.
{x|x is any real number greater than -6}
- E.
NO ANSWER
Correct Answer
C. {x|x is any real number greater than or equal to -6}Explanation
The correct answer is {x|x is any real number greater than or equal to -6}. This is because the given function states that x can be any real number greater than or equal to -6. The domain of a function refers to the set of all possible input values, and in this case, the input values can be any real number greater than or equal to -6.Rate this question:
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- 16.
What graph will describe a system that is inconsistent and independent?
- A.
Intersecting lines
- B.
Coincident lines
- C.
Parallel lines
- D.
Perpendicular lines
- E.
NO ANSWER
Correct Answer
C. Parallel linesExplanation
Parallel lines will describe a system that is inconsistent and independent. Inconsistent systems have no solution, meaning the lines do not intersect. Independent systems have a unique solution, meaning the lines do not coincide or overlap. Therefore, parallel lines fit this description as they do not intersect and have no common points.Rate this question:
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- 17.
How many solutions does a consistent, dependent system have?
- A.
None
- B.
1
- C.
2
- D.
Infinitely many
- E.
NO ANSWER
Correct Answer
D. Infinitely manyExplanation
A consistent, dependent system has infinitely many solutions because it represents a situation where the equations are not independent and are essentially the same equation. This means that every value that satisfies the equation will also satisfy the other equations in the system, resulting in an infinite number of possible solutions.Rate this question:
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- 18.
The system has
- A.
No point of intersection
- B.
One point of intersection
- C.
Infinitely many points of intersection
- D.
Two points of intersection
- E.
NO ANSWER
Correct Answer
A. No point of intersectionExplanation
The given answer "no point of intersection" suggests that the system of equations or lines being referred to do not intersect each other. This means that the lines are either parallel or coincident, resulting in no intersection point.Rate this question:
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Current Version
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Jun 26, 2023Quiz Edited by
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Oct 11, 2012Quiz Created by
Lopezbrianroy3
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