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riadik2000 [5.3K]
3 years ago
14

What is the value of n? ​

Mathematics
1 answer:
scoundrel [369]3 years ago
4 0

Answer:

5?

Step-by-step explanation:

You might be interested in
-5(6 +x)<br> Using distributed property
UkoKoshka [18]

Answer: -30 -5x

Step-by-step explanation:

(-5 times 6) = -30

(-5 times x)= -5x

you could write it as -30 + -5x or -30 -5x it’s the same thing

7 0
3 years ago
Read 2 more answers
What is the recursive of this:
abruzzese [7]

Answer:

a_n=a_{n-1}+2^{n-1}\ \ n>1

Step-by-step explanation:

Recursive Sequence

We are given the following sequence:

-1, 1, 5, 13...

It's required to find the recursive term for the sequence.

A recursive formula calculates each term as a function of one or more previous terms.

To find the recursive formula, we must find a pattern and transform it into a math expression.

Let's write the sequence, and below it, the difference of consecutive terms:

-1,   1,   5,   13...

+2,  +4,  +8

Note the difference between consecutive terms is always a power of 2, starting from 2^1, 2^2, 2^3.

The exponent is one less than the number of the term, thus:

a_n-a_{n-1}=2^{n-1}

Thus:

\mathbf{a_n=a_{n-1}+2^{n-1}\ \ n>1}

Testing:

n=1

a_1=-1 (given).

n=2

a_2=a_{1}+2^{2-1}=-1+2^{1}=1

n=3

a_3=a_{2}+2^{3-1}=1+2^{2}=5

n=4

a_4=a_{3}+2^{4-1}=5+2^{3}=13

3 0
2 years ago
20% of what number is 98?
GREYUIT [131]
19.6 is the answer to your question
6 0
3 years ago
Read 2 more answers
7x - y = - 1 + -7x + 3y = - 25
Fittoniya [83]
Hope this helps you out :D

It’s 2 equations so in order to solve the previous system, you can use different methods, as for example substitution or addition of equations. In this case, you use the second one, due to the fact you have 7x in one equation and -7x in the other equation. In this way you can easily eliminate variable x and then solve for y. With the value of y you can replace in any of the two equations and solve for x.

7x-y=-1
-7x+3y=-25

Summarizing, you proceed as follow:
- add up the given equations

7x - y = -1

-7x+3y=-25
——————
0 +2y=-26

- solve for y in the previous equation

2y=-26
y=-26/2
y=-13


- replace the obtained value of y in one of the given equations, and solve for x

7x-(-13)=-1

7x+13=-1

7x=-1-13

7x=-14

x=-14

x=-14/7

x=-2


Hence, the solution of the given systems of equation is:

X=-2

Y=-13

4 0
3 years ago
B R O<br> H E L P<br> M E<br> T H A N K <br> Y O U : &lt; )
Ksivusya [100]
Rules: (-) plus (-) equals positive.
Anything negative in absolute value will turn positive. Example, | -2 | —> 2

|-4b-8|+|-1 -b^2| +2b^3; b=-2

First step is substituting all the “b” to -2.
|-4(-2) -8| + |-1 -(-2)^2| +2(-2)^3
Then start solving.
|8-8| + |-1 -(4)| +2(-8)
|0| + |-5| -16
0 +5 -16= -11
Answer: -11
4 0
3 years ago
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