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Veronika [31]
3 years ago
10

Select a counter-example that makes the conclusion false.

Mathematics
2 answers:
Ludmilka [50]3 years ago
6 0
Conclusion : the difference of 2 positive numbers is always positive.
7 - 3 = 4, 8 - 5 = 3, 9 - 8 = 1

Counter example : 3 - 7 = -4 , 5 - 8 = -3, 8 - 9 = -1
Leya [2.2K]3 years ago
4 0

The statement is False.

For this, it is enough to show a case in which the subtraction of two positive numbers is negative.

For this, we must choose two numbers.

Suppose we want to subtract the following numbers:

Number 1: 5

Number 2: 10

Subtracting both numbers we have:

5 - 10 = -5

We observe that the result is negative. Therefore, the given conclusion is false.

Answer:

Counterexample:

5-10 = -5

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The Cinemania theater showed 108108108 different movies last year. Of those, 151515 movies were action movies. Based on this dat
Ahat [919]

Answer:

Option B.

Step-by-step explanation:

It is given that,

Last year the total number of movies = 108

Number of action movies = 15

Based on this data, we need to find a reasonable estimate of the probability that the next movie is an action movie.

So, the required probability is:

\text{Probability}=\dfrac{\text{Number of action movies}}{\text{Total number of movies}}

\text{Probability}=\dfrac{15}{108}

Hence, the correct option is B.

7 0
3 years ago
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Y>2x y>3 orderd pair
Ipatiy [6.2K]
<h2>Answer:</h2>

<h2>Step-by-step Explanation;</h2>

y  > 2x \: y \:  >  \: 3 \:  \\ solve \: for \: x \\ x \: € \: ( \frac{3}{2y}  \:  \frac{1}{2}  )\: y >  \: 3 \\ solve \: for \: y \\ y \:  >  \:  \frac{3}{2x}  \: x \:  >  \: 0 \: and \: x \:  < \:  \frac{1}{2}

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6 0
3 years ago
Please explain how you got your answers! (: Solve the problem by using the counting principle.
Natasha2012 [34]
A. The number of fabric-pattern-color combinations is 4 * 13 * 9 = 468

B. P(1st choice) = no of novels / total books = 3/6 = 1/2
    P(2nd choice) = no of remaining novels/ total remaining books = 2/5
    P(both novels) = 1/2 * 2/5 = 1/5          (without replacement assumed)

C. P(1st choice) = no of biographies / total books = 2/6 = 1/3
    P(2nd choice) = no of remaining biographies/ total remaining books =        1/5
    P(both biographies) = 1/3 * 1/5 = 1/15          (without replacement                assumed)

D. P(1st choice) = no of history books / total books = 1/6
    P(2nd choice) = no of novels/ total remaining books = 3/5
    P(a history, then a novel) = 1/6 * 3/5 = 1/10          (without replacement assumed)
7 0
3 years ago
A video game store allows customers to rent games for 4.75 each. Customers can also buy a membership for $54 annually, and video
ankoles [38]
Answer:

24 video games

Step-by-step explanation:

Let x represent number of video games.
We have been given that a video game store allows customers to rent games for $4.75 each. So the cost of renting x video games would be 4.75x.

We are also told that customers can also buys a membership for $54 annually, and video games would only cost $2.50 each. The cost of renting x video games after membership would be 2.50x + 54

To find the number of video-games that will cost same for both options, we will equate both expressions as:

4.75x = 2.50x + 54
4.75x - 2.50x = 2.50x - 2.50x + 54


Therefore, a customer would have rent 24 video games in a year in order for the two options to be equal.
3 0
3 years ago
Serena estimates that she can paint 60 square feet of wall space every half-hour. Write an equation for the relationship with ti
Katarina [22]

Answer:

So, the relationship with i hours as the indecent variables would be  

Serena can't paint 400 square feet of wall space of wall space in 3.5 hours.

Step-by-step explanation:

Since we have given that

Area that she can paint = 60 square feet

Time taken = half hour = 30 minutes = 0.5 hours

Using "Unitary method, we get that

In 0.5 hours, she can paint = 60 square feet

In 1 hour, she can paint =  

In i hours, she can paint =  

Let the total area she can paint be 'y'.

So, the relationship with i hours as the indecent variables would be

Now,  Can Serena paint 400 square feet of wall space i. 3.5 hours

We put y = 400 and i = 3.5 hours to check whether it is equal or not.

Hence, Serena can't paint 400 square feet of wall space of wall space in 3.5 hours.

6 0
3 years ago
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