1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
NARA [144]
3 years ago
9

4.

Mathematics
1 answer:
Svetradugi [14.3K]3 years ago
3 0

Answer:

A. Yes; no vertical line passes through two graphed points

Step-by-step explanation:

You might be interested in
Hey plsss help meeeeee
nalin [4]

Answer:

The first, third, and fourth answer choices represent a function.

Step-by-step explanation:

A relation is a relationship between sets of values. The two quantities that are being related to each other are the input (x-variable) and the output (y-variable). But relations in general aren't always a good way to relate between x and y.

Say that I have situation where I want to give <em>x </em>dollars to the cashier so he can change them to <em>y</em> quarters. Here is a "example" of the relation:

Dollars (x) | Quarters (y)            

----------------------------------              

       0       |          0                      

        1       |          4                      

       2       |          8

       2       |          12

Do you see something wrong here? Yes! We all know that you can't exchange 2 dollars for 12 quarters. You can only exchange 2 dollars for 8 quarters and only 8 quarters. This is a general reason why we don't rely on general relations for real-life situations. One x-variable does not exactly map to one and only one y-variable.

However, a relation that can map one x-variable to one and only one y-variable is known as a function. Let's make the above example an actual function to prove a point:

Dollars (x) | Quarters (y)            

----------------------------------              

       0       |          0                      

        1       |          4                      

       2       |          8

       3       |          12

Now, the 3 dollars make 12 quarters as it should. This is how a function should look like.

There are two ways to check if a relation is a function. On a relation, table, or a set of ordered pairs, you have to make sure there is no "x-variable" that repeats. All x-values of a relation have to be unique in order to be a function. On a graph, you can also perform the Vertical Line Test. If you draw vertical lines over a relation and if the lines cross only once, then it is a function. If not, it fails the Vertical Line Test.

So to answer you're question, the first, third, and fourth choices are functions because they all have unique x-variables. The second choice is not a function because it fails the Vertical Line Test.

7 0
3 years ago
Please answer this
pentagon [3]

Answer:

14 in^3.

Step-by-step explanation:

The volume = volume of the bottom prism + volume of the top pyramid

= area of base * height of the prism + 1/3 * area of base * height of the pyramid

= 2 * 1.5 * 4 + 1/3 * (2*1.5) * 2

= 3*4 + 1/3 * 6

= 14 in^3.

6 0
3 years ago
Consider the following proposed proof by contradiction that for all positive integers n, 3n &gt; 2.
laila [671]

Answer:

The proof contains a simple direct proof, wrapped inside the unnecessary logical packaging of a proof by contradiction framework.

Step-by-step explanation:

The proof is rigourous and well written, so we discard the second answer.

This is not a fake proof by contradiction: it does not have any logical fallacies (circular arguments) or additional assumptions, like, for example, the "proof" of "All the horses are the same color". It is factually correct, but it can be rewritten as a direct proof.

A meaningful proof by contradiction depends strongly on the assumption that the statement to prove is false. In this argument, we only this assumption once, thus it is innecessary. Other proofs by contradiction, like the proof of "The square root of 2 is irrational" or Euclid's proof of the infinitude of primes, develop a longer argument based on the new assumption, but this proof doesn't.

To rewrite this without the superfluous framework, erase the parts "Suppose that the statement is false" and "The fact that the statement is true contradicts the assumption that the statement is false. Thus, the assumption that the statement was false must have been false. Thus, the statement is true."

7 0
3 years ago
Sarah's father was 30 when she was born.
Basile [38]

Answer:

He is B) 45 years old

Step-by-step explanation:

If he was 30 when she was born, he was 40 when she was 10, and he was 45 when she was 15.

15 x 3 = 45

Edit: It can actually be any of them....

3 0
2 years ago
Read 2 more answers
Suppose a man offered to work for 30 days at the following salary: one cent for the first day two cents for the second day four
MatroZZZ [7]
It would be to little because it would only be 30 cents
6 0
3 years ago
Other questions:
  • What's 0.003 is 1/10 of what?
    15·1 answer
  • Use the figure to the right to find the value of PT. T is the midpoint of PQ.
    14·1 answer
  • Simplify.<br> - 4(x+5) + 5x
    5·2 answers
  • Which is the approximate solution for the system of equations x + 5= 10 and 3x + y = 1?
    12·2 answers
  • I
    14·1 answer
  • The table shown gives values of the function y=g(x) for selected values of x.​
    11·1 answer
  • Benny sold half of his comic books and then bought 6 more. He now has 17. How many did he begin with ? i need to write it in num
    5·1 answer
  • Delilah and Amara are both saving money for their vacation. Delilah plans to deposit $17.60
    7·1 answer
  • URGENT!! <br><br> Please divide this polynomial
    8·1 answer
  • Instructions: Find the surface area of the figure below. Round your answers to the nearest tenth, if necessary.
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!