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4 years ago

Why is 2 + (−3) equal to −1?

Mathematics

2 answers:

natali 33 [55]4 years ago

7 0

Answer:

The answer is D.

Step-by-step explanation:

On a number line

:-Adding a positive number means moving to the right

-Adding a negative number means moving to the left

basically the easiest way to explain is pretend to have a point at -3 if you move it to the right 2 times your point will now be at -1.

lord [1]4 years ago

6 0

Answer:

Because it is 3 units to the left of 2 on a horizontal number line. (first answer)

Step-by-step explanation:

when you substract you take the number your substracting and move it to the left of the number line the number your substracting.

In this case you have 2 and you substract 3 so from 2 you move 3 spaces from the numberline to the left

Which is the first one.

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Find the perimeter and area

blondinia [14]

Answer:

perimeter = 67

Step-by-step explanation:

7 0

3 years ago

2. What is a benefit of the rule of law?

Firdavs [7]

I claim that this the correct answer is D.

The evidence that I recognize is the document named "The Magna Carta" written in 1215

The reason why this evidence supports my answer is because it required King John to protect the nobles' privileges and some rights. It also establishes the 'writ of habeas corpus'.

6 0

3 years ago

The first and third terms in the following Fibonacci sequence are x and y.

Dahasolnce [82]

Answer:

<h3>The second term of the sequence is y-x</h3><h3>The fourth term of the sequence is 2y-x</h3><h3>The fifth term of the sequence is 3y-x</h3>

Step-by-step explanation:

The next term of a Fibonacci sequence is generated by taking the sum of the 2 preceding value of the sequence. Given the the first and third term of a Fibonacci sequence to be x and y

x, _, y...

let the second term be a, fourth term be b and fifth term be c to have the sequence;

x, a, y, b, c...

According to the definition;

x+a = y... 1

a+y = b... 2 and;

y+b = c... 3

From equation 1, a = y-x

Substituting a = y-x into equation 2 to get b we have;

(y-x)+y = b

2y-x = b

b = 2y-x

Substituting b = 2y-x into equation 3 to get 'c'

y + 2y-x = c

3y-x = c

c = 3y-x

The second term of the sequence is y-x

The fourth term of the sequence is 2y-x

The fifth term of the sequence is 3y-x

8 0

3 years ago

Can i get some help with this!

creativ13 [48]

I think you've got it, I don't know man.

3 0

3 years ago

15, 11, 7, 3, -1, ... explicit formula and recursive formula

monitta

Recursive formula is: $a_n = a_{n-1} -4$

Explicit formula is: $a_n = 19-4n$

Step-by-step explanation:

Given sequence is:

15,11,7,3,-1

Here

$a_1 = 15\\a_2 = 11\\a_3 = 7$

First of all, we have to find the common difference

Common difference is the difference between consecutive terms of an arithmetic sequence

So,

$d = a_2-a_1 = 11-15 = -4\\d = a_3-a_2 = 7-11 = -4$

<u>Recursive Formula:</u>

A recursive formula is used to find the next term of an arithmetic sequence using previous term and common difference

General form of recursive formula for a given common difference d is:

$a_n = a_{n-1} + d$

Putting the value of d

$a_n = a_{n-1} -4$

<u>Explicit Formula:</u>

The explicit formula is given by:

$a_n = a_1 + (n-1)d$

Putting the first term and common difference

$a_n = 15 + (n-1)(-4)\\a_n = 15 -4n+4\\a_n = 19-4n$

Hence,

Recursive formula is: $a_n = a_{n-1} -4$

Explicit formula is: $a_n = 19-4n$

Keywords: Arithmetic sequence, common difference

Learn more about arithmetic sequence at:

#LearnwithBrainly

4 0

3 years ago