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ddd [48]
3 years ago
12

Pls hellpp! will give 15 points and brainliest!

Mathematics
1 answer:
mamaluj [8]3 years ago
8 0

Answer: A. 12x

Step-by-step explanation:

14x-(2x-y)-y

14x-2x+y-y

Simplify = 12x

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HELP PLS!!! ( see picture for the question )
Ulleksa [173]

Answer:

find the current mean(average), then add 10, last divide by 1.3

Step-by-step explanation:

3 0
3 years ago
Solve the following inequality : -6x-9 less than it equal to 3
Nat2105 [25]

Answer:

-2

Step-by-step explanation:

-6x - 9 ≤ 3

     + 9 ≤ +9

-6x ≤ 12

----    -----

-6      -6

x    ≤   -2

7 0
3 years ago
Suppose the Tower of Hanoi rules are changed so that stones may only be transferred to an adjacent clearing in one move. Let In
Svet_ta [14]

Answer:

l_n=3^n-1

Step-by-step explanation:

We will prove by mathematical induction that, for every natural n,  

l_n=3^n-1

We will prove our base case (when n=1) to be true:

Base case:

As stated in the qustion, l_1=2=3^1-1

Inductive hypothesis:  

Given a natural n,  

l_n=3^n-1

Now, we will assume the inductive hypothesis and then use this assumption, involving n, to prove the statement for n + 1.

Inductive step:

Let´s analyze the problem with n+1 stones. In order to move the n+1 stones from A to C we have to:

  1. Move the first n stones from A to C (l_n moves).
  2. Move the biggest stone from A to B (1 move).
  3. Move the first n stones from C to A (l_n moves).
  4. Move the biggest stone from B to C (1 move).
  5. Move the first n stones from A to C (l_n moves).

Then,

l_{n+1}=3l_n+2.

Therefore, using the inductive hypothesis,

l_{n+1}=3l_n+2=3(3^n-1)+2=3^{n+1}-3+2=3^{n+1}-1

With this we have proved our statement to be true for n+1.    

In conlusion, for every natural n,

l_n=3^n-1

8 0
3 years ago
Solve the equation for x. 25x = 275 <br><br>x =​
Sliva [168]

Answer:

x = 11

Step-by-step explanation:

So the equation is  25x = 275. In order for us to find out what x is we need to get rid of 25 that is next to x, so we are going to have to divide 25x by 25. What you do to one side you do to the other so the equation will look like this:

25x/ 25 = 275/ 25

25x/25 = x

275/25 = 11

so x = 11

4 0
3 years ago
These triangles are similar. Find?
lukranit [14]

Answer:

4

Step-by-step explanation:

3 0
3 years ago
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