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AURORKA [14]
3 years ago
15

-7÷x=19need your help​

Mathematics
1 answer:
RSB [31]3 years ago
8 0

Answer:

the answer is 26

Step-by-step explanation:

you add 7 to -7 and 19. the positive and negative 7 cancels each other out. them you add 19 and 7 which is 26. that means x is 26.

btw watch hameltion its on diesny plus its the best musical ever, just give it a try.

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Can someone please help. i suck at math
Andrews [41]

Because the two triangles are similar, the angle of one letter would be the same for the corresponding angle of the other triangle.


In the given example R = L

S = M

T = N


Because M is given as 70 degrees, then S is also 70 degrees.

now you have R = 65 and S = 70


The three inside angles of a triangle equal 180, so to find T subtract R ans S from 180.


T = 180 - 65 - 70 = 45

T = 45 degrees.

3 0
4 years ago
The area of a triangle is 861 square cm. The length of the base is 82 cm. What is the height of the triangle?
Cerrena [4.2K]
Hi!

The equation to find the area of a triangle is...

(a = area
b = base
h = height)

a =  \frac{1}{2} bh

Fill in the values that we already have.
861 = \frac{1}{2}82*h
Divide both sides by 1/2
861/ \frac{1}{2}  = \frac{1}{2}/ \frac{1}{2}82*h
1722 = 82*h
Divide both sides by 82.
1722/82 = 82/82*h
21 = h

The answer is B. 21 cm

Hope this helps! :)
5 0
3 years ago
HELP!!!!! PLEASE!!!!!!
viktelen [127]
First one hope this helps!
6 0
3 years ago
Read 2 more answers
A bicyclist travels at a constant speed of 12 miles per hour for a total of 45 minutes. Use set notations for the domain and ran
Mama L [17]

A bicyclist travels at a constant speed of 12 miles per hour for a total of 45 minutes

Domain x is number of hours

Range y is distance traveled

speed = 12 miles per hour

time = 45 minutes = \frac{45}{60} = 0.75 hours

We know distance formula

Distance = speed * time

Distance = 12 * 0.75= 9 miles

Number of hours x is 0 to 0.75 hours

So domain is { x | 0}

Distance is 0 to 9 miles

So range is { x | 0}

5 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
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