Only false statements have counterexamples. true or false

Answers

Answer 1

The statement 'Only false statements have counterexamples' is false.

A counterexample is an instance that disproves a statement by providing an example where the premises are true, but the conclusion is false. Thus, only false statements have counterexamples can be considered false. A true statement cannot have a counterexample because that would contradict its truth.

For example, consider the statement 'All swans are white.' A single observation of a black swan would be a counterexample that disproves this statement, showing it is false.

Related Questions

Which planet is 10 times as far as earth is from the Sun

Answers

the answer to 15 is Saturn

Saturn is the answer

If p-1 is a factor of p^4+p^2+p-k the value of k is

Answers

p=1
p^4+p^2+p-k=0

1+1+1-k=0 k=3

The value of k is 3 if p - 1 is a factor of [tex]p^4+p^2+p-k[/tex]

How to determine the value of k?

The expression is given as:

[tex]p^4+p^2+p-k[/tex]

The factor is given as:

p - 1

Set the factor to 0

p - 1 = 0

Add to both sides

p = 1

Substitute 1 for p in the expression and equate it to 0

[tex]1^4+1^2+1-k = 0[/tex]

Evaluate the exponents

1+1+1-k = 0

Evaluate the sum

3-k = 0

Add k to both sides

k = 3

Hence, the value of k is 3 if p - 1 is a factor of [tex]p^4+p^2+p-k[/tex]

Answers

i)
fist let's find O, that is the number of all numbers between 10,000 and 100,000, whose all digits are odd.

so we have to count: 11,111; 11,113; ... 99,999

we notice that all these numbers are 5 digit, and they are made up of the odd digits {1, 3, 5, 7, 9} with repetition allowed.

so there are in total [tex]5*5*5*5*5= 5^{5} [/tex] such numbers.

ii)

E is the total number, of 5-digit numbers formed from the set{0, 2, 4, 6, 8} with repetition allowed, and the first digit not equal to 0.

so [tex]E=4*5*5*5*5= 4*5^{4}[/tex]

iii) [tex]O-E=5^{5}-4*5^{4}=5^{4}(5-4)=5^{4}=625[/tex]

Answer: 625

Which is an obtuse angle?

∠CAB

∠BAC

∠BCA

∠ABC

Answers

BCA is an obtuse angle

Obtuse angle is an angle that is greater than 90° but less than 180°

∠BCA ← answer

Express without negative exponents

Answers

1/5^-1 = 5

.4^-2 = 6.25

so it would be 5 x 6.25

2. If you have budgeted 12% of your monthly income for groceries, how much can you spend on groceries if you earn $950 bi-weekly?

Answers

bi weekly means you get paid every 2 weeks ( 2 times a month)

950*2 = 1900 per month for pay

1900*0.12 = 228 a month for food

Answer:

if you earn $950 bi-weekly, you earn 2 x 950 = $1900 per month. If you have budgeted 12% of your monthly income for groceries you need to find 12% of $1900: (1900 / 100) x 12 = 228. Answer: you can spend $228 a month on groceries.

can someone help with this

Answers

Hey There! :)

Solve for g.
[tex]g/20=12/48 [/tex]
Isolate the variable; Multiply both sides by 20.
[tex](g/20)*20=(12/48)*20 [/tex]
[tex]g=240/48 [/tex]
[tex]g=5[/tex]

Hope this helps.
-Benjamin

Write an equation ten times the sum of half a number and 6 is 8.

Answers

10(1/2x+6)=8
Is the equation. Hope this helped!

10(x/2+6)=8
the x/2 means x over two

Arlene is comparing the prices of two truck rental companies. Company A charges $7 per hour and an additional $30 as service charges. Company B charges $8 per hour and an additional $40 as service charges.

Part A: Write an equation to represent each company's total charges for renting a truck for a certain number of hours. For both equations (one for Company A and one for Company B), define the variable used. (4 points)

Part B: Which company would charge less for renting a truck for 8 hours? Justify your answer. (3 points)

Part C: How much money is saved by using the services of Company A instead of Company B to rent a truck for 2 hours? (3 points)

Answers

Part A:
Company A: $7 per hour +$30 service charge =money spent
Company B: $8 per hour +$40 service charge =money spent

Part B:
Company A: $7(8)+$30 = $86
Company B: $8(8)+$40 = $104

Part C:
Company A: $7(2)+$30 = $44
Company B: $8(2)+$40 = $56
You would save $12 if you use Company A instead of Company B's truck rental.

Two trains leave stations 252 miles apart at the same time and travel toward each other. One train travels at 80 miles per hour while the other travels at 100 miles per hour. How long will it take for the two trains to meet?

Answers

First things first, distance = speed x time
So let's have "t" represent the time by both trains.
The first train shall be Train A and the other becoming Train B, so now we have Train A going 80t miles and Train B going 100t miles.

If two trains head toward each other, they will have traveled a total of 252 miles. The faster train will have traveled further (Train B), so the meeting point will be closer to the slower train's starting point (Train A).

So now we do 80t + 100t = 252
Which becomes 180t = 252
And by diving 252 by 180, you'll get that t is 1.4
This would mean they would meet at one hour and 24 minutes.

Final answer:

The time it takes for two trains traveling towards each other at speeds of 80 mph and 100 mph, and starting 252 miles apart, is found by dividing the distance by their combined relative speed. It takes them 1.4 hours or 1 hour and 24 minutes to meet.

Explanation:

To solve the problem of calculating the time it takes for two trains to meet, we need to understand the concept of relative speed in motion problems. When two objects move towards each other, their relative speed is the sum of their individual speeds. In this case, one train travels at 80 miles per hour and the other at 100 miles per hour, giving us a combined relative speed of 80 mph + 100 mph = 180 mph.

The distance between the two trains is 252 miles, and to find the time taken for the trains to meet, we divide the total distance by the relative speed:

Time = Distance / Relative Speed

Time = 252 miles / 180 mph

Time = 1.4 hours or 1 hour and 24 minutes for the two trains to meet.

Solve the equation for the letter L: A=LW

L = AW
L equals W over A
L = A − W
none of the above

Answers

[tex] \frac{L}{A} =LW[/tex] ⇒ Multiply both sides by A
[tex] \frac{LA}{A}=LWA [/tex] ⇒ The terms 'A' on the LHS cancel each other
[tex]L=LWA[/tex] ⇒ Divide both sides by 'L'
[tex] \frac{L}{L}= \frac{LWA}{L} [/tex] ⇒ The terms 'L' on the LHS cancel each other to '1' and the terms 'L' on the RHS will also cancel each other
[tex]1= WA[/tex]

The correct answer is the last option = none of the above

A car dealer recently sold five cars for the following profits: $10,126, $9,999, $12,398, $12,007, and $4,567. What was the mean for the profits of the sales?

Answers

Mean or Average is all of the sums divided by how many of the choices are there, so all of 10,126+9,99+12,398+12,007+4567=49097 and divided by all the choices you have which is 5 is 9819.4

Answer:

$9819.4

Step-by-step explanation:

We have been given that a car dealer recently sold five cars for the following profits: $10,126, $9,999, $12,398, $12,007, and $4,567. We are asked to find the mean for the profits of the sales.

Since mean is the average of numbers. So let us add all the profits and divide the sum of profits by number of cars.

[tex]\text{Mean for the profits of the sales}=\frac{10126+9999+12398+12007+4567}{5}[/tex]

[tex]\text{Mean for the profits of the sales}=\frac{49097}{5}[/tex]

[tex]\text{Mean for the profits of the sales}=9819.4[/tex]

Therefore, the mean for the profits of sales is $9819.4.

Find the value of X in the problem below. Geometry

Answers

(3x+10) +14x = 180

17x +10 = 180

17x=170

x = 170/17 = 10

x = 10

An architectural drawing lists the scale as 1/4 = 1. If a bedroom measures 3 1/2 by 5 1/4 on the drawing, how large is the bedroom

Answers

The bedroom is 14x21. I hope this helps :)

Answer:

The measure of the bedroom is 14 by 21

Step-by-step explanation:

This scale represents the every measure in the drawing is a 1/4 of the original measure, so to find the original measure you must multiply the measure you find in the drawing by 4.

So for the beadroom (3 1/2, 5 1/4), you multiply each one by 4

The real measures of the beadroom are:

(3 1/2 * 4, 5 1/4 * 4)

(14,21)

The measure of the bedroom is 14 by 21

An angle measures 20° more than the measure of a complementary angle. What is the measure of each angle?

Answers

complementary angles, sum = 90
so
x + x + 20 = 90
2x = 70
x = 35

35 + 20 = 55

answer
the measure of each angle: 55 and 35

Haley and Samuel can each make one gift box in two hours. Rachael takes three hours to make the gift box alone. If Haley, Samuel, and Rachael work together, how long will it take them to make one gift box?

Answers

It will take 40 minutes for them to make one gift box.

Combined rates

Given that Haley and Samuel can each make one gift box in two hours, while Rachael takes three hours to make the gift box alone, to determine, if Haley, Samuel, and Rachael work together, how long will it take them to make one gift box, the following calculation must be performed, using combined rates:

1/2 + 1/2 + 1/3 = X3/6 + 3/6 + 2/6 = X8/6 = X6/6 = 1 hour8/6 = 40 minutes

Therefore, it will take 40 minutes for them to make one gift box.

Learn more about combined rates in https://brainly.com/question/10729109

#SPJ1

Answer:It will take 40 minutes for them to make one gift box

Step-by-step explanation:

Which is a unit rate ? 4 dollars to 3 cans 5 students to 2 teachers 6 hours and 1 book 3 miles 2 days

Answers

6 hours to 1 book is a unit rate because the independent variable (books) is equal to 1.

Hope this helps!

Answer:

6 hours to 1 book

Step-by-step explanation:

K+3d=8c-8d

solve for d

Answers

Move k to the other side to isolate d.

So we will get 3d = 8c - 8d - k

Now divide both sides by 3 to isolate d.

So d = 8/3c - 8/3d - k/3

Please help me :) Thanks!

Answers

x^2+12x+5 = (x+6)^2 -31,

So the minimum value is y = -31. Dunno if -31 or you have to type =-31, I guess just '-31'?

With derivatives:

y' = 2x+12=0, x = -6, then y(-6) = 36-72+5 = -36+5 =-31

Just to be sure!!!! lol

The minimum value for y in the equation y = x² + 12x + 5 is (-6,-31). Here's how I figured it out:

Step 1: Figure out if the parabola is going up or down. If "a" is positive, the parabola will go up. If "a" is negative, the parabola will go down. In your case...

a = 1
Positive
Up
____________________________________________________________

Step 2: Find the Axis of Symmetry.

Formula: -b -12 -12
--------- = ------------ = ------------- = -6
2a 2(1) 2

The axis of symmetry is x = -6.
____________________________________________________________

Step 3: Plug in the value you found for the axis of symmetry for x into your original equation.

f(-6) = -6² + 12(-6) + 5
f(-6) = 36 - 72 + 5
f(-6) = -36 + 5
f(-6) = -31

The minimum gets written as an ordered pair: (-6,-31).
⊕ The axis of symmetry is the first number in the coordinate pair.
⊕ The answer that you get to step 3 is the second number in the pair.
____________________________________________________________

I hope that my answer helps you! This is the method that I use to solve these types of problems, but there are also other methods.

A recipe for muffins calls for 3⁄5 of a cup of sugar and 4 cups of flour. If you want to make a bigger batch, using 5 cups of flour, how much sugar will you need?

Answers

(3/5) / 4 = x / 5
cross multiply
4x = 5(3/5)
4x = 3
x = 3/4....it would need 3/4 cups of sugar

Everett made 3/5 of the baskets he shot. Suppose he shot 60 baskets. How many did he make?

Answers

Everett made 36 shots

You have to multiply 5×12 to get 60. And whatever you do on the bottom you do on the top. So
you then multiply 3×12 and you
get 36. So he got 36 out of 60
shots.

3 (12) 36
-- = --
5 (12) 60

11 POINTS GUYS PLZ
Answer 12 and 14

Answers

12) 10.77 + 2.09 + 0.75 = 13.61

13.61 x 1.07 = $14.56

total amount = $14.56

14) C shows the possible combinations

Which of the following best describes the expression 6(y + 3)?

1.)The product of two constant factors six and three plus a variable
2.)The sum of two constant factors six and three plus a variable
3.)The product of a constant factor of six and a factor with the sum of two terms
4.)The sum of a constant factor of three and a factor with the product of two terms

Answers

6(y + 3)

The product of a constant factor of 6 and a factor with the sum of 2 terms

Answer: Hence, option '3' is correct.

Step-by-step explanation:

Since we have given that

[tex]6(y+3)[/tex]

This expression can be written in statement.

Here, we can see that there are two terms:

1) A constant factor of 6

2) Sum of two terms

So, according to options it can be written as :

The product of constant factor of 6 and a factor with the sum of two terms i.e. y and 3.

Hence, option '3' is correct.

The restaurant bill you and your friend received was not itemized. You ordered 2 drink refills and the egg breakfast, for a total of $8.40. Your friend ordered 3 refills and the egg breakfast for $9.35.
(a) Write a system of equations for the situation. Use r for the amount charged for a refill and b for the amount charged for the egg breakfast.
(b) Graph the equations in the system.
(c) Use your graph to estimate how much each item cost.

Answers

Show work: Total=$17.75 R=$0.95×5 R=$4.75 $17.75-$4.75=$13.00 $13.00÷2=$6.50

Answer:
(1) Egg Breakfast $6.50
(2) Egg Breakfast $6.50
(3) Refill #1 $0.95
(4) Refill #2 $0.95
(5) Refill #3 $0.95
(6) Refill #4 $0.95
(7) Refill #5 $0.95

Check answer: $6.50+$6.50=$13.00
$0.95+$0.95=$1.90
$0.95+$0.95=$1.90
$1.90+$1.90=$3.80
$3.80+$0.95=$4.75
$13.00+$4.75=$17.75

Total: $17.75

Let set A = {odd numbers between 0 and 100} and set B = {numbers between 50 and 150 that are evenly divisible by 5}. What is A ∩ B? (2 points)

Answers

A = {odd numbers between 0 and 100}
A = {1, 3, 5, 7,...., 95, 97, 99}

B = {numbers between 50 and 150 that are evenly divisible by 5}
B = {50, 55, 60, 65, ..., 140, 145, 150}

The notation A ∩ B means the set of items that are in set A and also in set B. In terms of venn diagrams, it's the overlapping region between circle A and circle B

In this case, the following values are found in both set A and set B
{55, 65, 75, 85, 95}

So that's why
A ∩ B = {55, 65, 75, 85, 95}
which is the final answer

If n = 8 and 16 • 2m = 4n – 8, then m = ?

Answers

Hello there! Thank you for asking your question here at Brainly. I will be assisting you today with answering your question, and will teach you how to handle it on your own in the future.

First, let's examine the question, and proceed to evaluate once we understand what we're dealing with.

"If n = 8, and 16 • 2m = 4n - 8, then m = ?"
This question is requesting for us to input the value for n, and then solve for m.

Here is our equation:
16 • 2m = 4n - 8

Let's plug in 8 for n.
Our equation should look like this now:
16 • 2m = 4(8) -8
First, let's get 4(8) by itself; Add 8 to both sides.
16 + 8 = 24
-8 + 8 = 0

Our equation is now:
24 • 2m = 4(8)
Multiply 4 by 8 to simplify the right side of the equation.
4 • 8 = 32

Now we have:
24 • 2m = 32

To solve for m, we need to isolate 2m and then divide both sides by 2.
Subtract 24 from both sides to isolate 2m.
24 - 24 = 0
32 - 24 = 8

Our equation is now:
2m = 8
Divide both sides by 2 to solve for m.
2m / 2 = m
8 / 2 = 4

Our final equation and solution is:
m = 4.
The value for m is 4.
I hope this helps!

Final answer:

The value of m is 0.75 when n = 8 and the equation 16 • 2m = 4n – 8 is satisfied, by performing simple algebraic operations to isolate and solve for m.

Explanation:

To find the value of m when n = 8 and 16 • 2m = 4n – 8, we first replace n with 8 in the second equation:

16 • 2m = 4(8) – 8

16 • 2m = 32 – 8

16 • 2m = 24

Now we divide both sides of the equation by 16 to isolate 2m:

2m = 24 / 16

2m = 1.5

Finally, to find m, we divide both sides of the equation by 2:

m = 1.5 / 2

m = 0.75

So the value of m that satisfies the given conditions is 0.75.

A triangle has angles that measure 30, 60, 90. The hypotenuse of the triangle measures 10 inches. Which is the best estimate for the perimeter of the triangle?

Answers

10cos60=5
10sin60=8.66
since you have the measure of the hypotenuse, add 10+5+8.66
=23.66

How to simplify the expression 60/(-4)

Answers

Hey!

We could rewrite the problem as: [tex]\frac{60}{-4}[/tex]
Since we have a negative number, we could rewrite the fraction like this.
[tex]=-\frac{60}{4}[/tex]
Let's simplify it...
[tex]-\frac{60}{4}=-15[/tex]
Our answer would be:
[tex]=-15[/tex]

Thanks!
-TetraFish

how to write unit form for (2 tens 1 one) x 10

Answers

Numbers are arranged by their place values. Place values give a quantity of value to a certain digit in a number. Given a number, the rightmost number is the ones place, followed by the tens place, hundreds, thousands, ten thousands, hundred thousands, millions, ten millions, hundred millions, as so on and so forth. The place value of a certain digit is 10 times bigger than its adjacent digit to the right.

So for this problem, all you have to do is multiply the number of units of each place value, then multiple them all by 10.

(2(10) + 1(1))×10
21 × 10 = 210

Therefore, the number is equivalent and written as 210.

What is the area of a triangle that has a height of 4 feet and a base length of 9 feet? 18 feet2 36 feet2 144 feet2 324 feet2

Answers

18 feet.

9 x 4 = 36

36/2 = 18

18 feet is the answer hope this helps!!

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