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
Vika [28.1K]
3 years ago
7

What is a counterexample for "subtraction of whole numbers is commutative" ??

Mathematics
1 answer:
devlian [24]3 years ago
6 0
The commutatice property for addition says a+b=b+a
If it was for subtraction, then it would be a-b=b-a
Take a=7 and b=5
7-5 is not equal to 5-7
2 is not equal to -2
So subtraction is not commutative for whole numbers.

Hope this helps :)
You might be interested in
Carmen makes t-shirts and sells them online. She makes a profit of $5.00 per shirt but she has to pay $10.00 per day to PayPal f
igomit [66]

425/5.00=85 shirts add 2 more shirts to cancel out the paypal fee!

8 0
2 years ago
Read 2 more answers
1. What operations would you use in order to solve 3x – 4 = 26. Please write the operations in the order you would use them.
alex41 [277]

1. add the 4 to both sides

2. divide both sides by 3

3 0
3 years ago
How do I show that this function is one-to-one algebraically?<br> <img src="https://tex.z-dn.net/?f=f%28x%29%3D%20%28x-2%29%5E%7
Gwar [14]
For a one-to-one function, f(x) = f(y).
 So, lets find f(x) and f(y).

We know, 
f(x) = (x - 2)³ + 8

Now,
f(y) = (y - 2)³ + 8

Now, we said earlier, for a function to be one-to-one, f(x) = f(y).

Therefore,

            f(x) = f(y)
(x - 2)³ + 8 = (y - 2)³ + 8
      (x - 2)³ = (y - 2)³     
          x - 2 = y - 2
               x = y

Since we got x = y, we know for every x, there is one and only one y. Therefore, the function is one-to-one function.
 
6 0
3 years ago
maya purchased a prepaid phone card for $25.00. Calls cost 25 cents a minute using this card. the credit, C (in dollars), left o
Kay [80]

Answer:

$20 of credit left on the card

Step-by-step explanation:

If we say that the prepaid phone card has 25 minutes on it since Maya paid 25 dollars for it. We can multiply 25 times 4 which equals 1 dollar per 4 minutes. Then, we can divide 20 by 4 to get 5 which means that she used 5 dollars of call time. We can now subtract 25-5 and we get 20. This tells us that there is 20 dollars left on the card.

Hope this helps!!! PLZ MARK BRAINLIEST!!!

4 0
3 years ago
Follow the steps to finish solving the equation –3x + 18 = 7x.
RSB [31]

Answer:

x= 9/5

Step-by-step explanation:

Once you divide 10 in both sides of the equation, you'll get 18/10. So, what you need to do is simplify the fraction, and you'll end up with 9/5

5 0
3 years ago
Other questions:
  • Which number is 2,678 less than 10,000
    5·2 answers
  • WILL GIVE BRAINLIEST, THANK YOU, AND RATING!!!
    13·1 answer
  • What kind of transformation is illustrated in this figure?
    9·2 answers
  • Suppose that circles A and B have a central angle measuring 75°. Additionally, circle A has a radius of 5 2 feet and the radius
    12·1 answer
  • Write the slope intercept form of the equation of the line through the given points. (5,-1) and (-5,2)
    11·1 answer
  • Why does dividing 5 by a decimal less than 1 give a quotient greater than 5
    7·1 answer
  • Write an equation and identify the r value
    15·1 answer
  • 一。<br><br> Nhshdjsjsjsnsnsjsjbxxjd
    13·1 answer
  • Given (x – 7)2 = 36, select the values of x.
    8·2 answers
  • Deondre's baseball team is selling raffle tickets for a fundraiser. It cost them $105 to print the tickets. They set a goal to m
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!