Ask question

Ask question

All categories

3 years ago

12

Combine like terms to create an equivalent expression: 4z-(-3z)

2 answers:

nordsb [41]3 years ago

3 0

The answer is: " 7z " .
____________________________________________________

<u>Note</u>: " 4z - (-3z) = ? " ;

Note that "subtracting a negative" is the same thing as "adding a positive" ;

→ " 4z - (-3z) = 4z + 3z = 7z .
____________________________________________________
The answer is: " 7z " .
____________________________________________________

charle [14.2K]3 years ago

3 0

7z. 2 negs make a pos. But two wrongs do not make a right.

You might be interested in

I need help please????

ivanzaharov [21]

-84
21x4=84 plus the negative

3 0

3 years ago

Use a graphing calculator to determine the solution of<br> 1-2x - y = 2<br> 13x + 2y=1

Arte-miy333 [17]

The first one is 2x+y=-1

the second one is 13x+2y-1=0

6 0

3 years ago

20 = n − 4, what is n?

Dovator [93]

Answer:

N = 24

Step-by-step explanation:

24 - 4 = 20

3 0

2 years ago

Find the highest common factor of 40 and 72

Bogdan [553]

The greatest common factor is 8

4 0

3 years ago

Read 2 more answers

A curious patterns occurs in a group of people who all shake hands with one another. It turns out that you can predict the numbe

ycow [4]

Missing part of the question

Determine the number of handshakes, i, that will occur for each number of people, n, in a particular room. (people)

Answer:

$S_n = \frac{n}{2}(n - 1)$

Step-by-step explanation:

Given

For 5 people

$\begin{array}{cc}{People} & {Handshakes} & {5} & {4} & {4} & {3} & {3} & {2} & {2} & {1} & {1} & {0} &{Total} & {10} \ \end{array}$

Using the given instance of 5 people, the number of handshakes can be represented as:

$(n - 1) + (n - 2) + (n - 3) + ........ + 3 + 2 + 1 + 0$

The above sequence is an arithmetic sequence and the total number of handshakes is the sum of n terms of the sequence.

$S_n = \frac{n}{2}{(T_1 + T_n})$

Where

$T_1 = n - 1$ --- The first term

$T_n = 0$ --- The last term

So:

$S_n = \frac{n}{2}(n - 1 + 0)$

$S_n = \frac{n}{2}(n - 1)$

7 0

2 years ago