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AlladinOne [14]
3 years ago
12

What does it mean for an equation to be balanced and why must you keep an equation in balance?

Mathematics
2 answers:
antiseptic1488 [7]3 years ago
7 0
When you talk about balanced equations you are talking about chemistry.

Chemical equation balance is to make sure that there are the same number of atoms of a given element in the right side than in the left side.

It is a chemical principle, the atoms do not create or destroy in a chemical reaction, then you have to count the same number of every kind of atoms in the left side than in the right side.

For example:H2 + O2 -> H2O is not balanced because there two atoms of oxygen in the left side and  1 atom of oxygen in the right side.

To balance this equation you have to insert coefficients:

2H2 + O2 -> 2H2O. Now you have 4 atoms of hydrogen in each side, and 2 atoms of oxygen in each side, making sure that none atoms was created or destroyed in the reaction. 
dlinn [17]3 years ago
4 0
An equation is balanced when both sides of the equation are equal to each other, hence making the equals sign in-between accurate. You must keep an equation balanced because, if you do not, the sides are not equal and your equal sign is false, leading your whole equation to be false.
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AABC is isosceles.<br> AB = 3x - 4 and BC = 5x - 10.<br> AB = [?]
Schach [20]

If AB = BC then set up the equation 3x - 4 = 5x - 10

Subtract 3x.

-4 = 2x - 10

Add 10.

6 = 2x

Divide by 2.

3 = x

AB is 3x - 4 so

3(3) - 4

9 - 4

5.

AB = 5

If AB is not equal to BC then this is not solvable.

But if they are I am sure AB = 5.

Hope this helps

4 0
3 years ago
What is the simplified equation of 9(x+3)-(2x+5)?
Zanzabum

Answer:

7x-2

Step-by-step explanation:

9(x+3)-(2x+5)

9x+3 -2x -5

7x-2

4 0
2 years ago
P + (-q) -3 when p= -6 and q=7
DochEvi [55]
Remember, -(-x)=x because the negatives cancel out

so
when p=-6 and q=7

p+(-q)-3
-6+(-7)-3
-6-7-3
-13-3
-16
5 0
3 years ago
Factor the polynomial by grouping. 12x^x+x−13
tekilochka [14]

Answer:

  (x -1)(12x +13)

Step-by-step explanation:

You are looking to rewrite the middle term as the sum of terms that have factors of (12)(-13) that have a total of +1. Those factors are -12 and +13, so the expression you are factoring by grouping is ...

  12x^2 +13x -12x -13

  = x(12x +13) -1(12x +13)

  = (x -1)(12x +13)

5 0
3 years ago
Why do you think items that come in a larger quantity cost less per unit
MAXImum [283]
They cost less because there are more items in stock meaning that there isn't a limit here is another way of thinking if there are less Items then they can charge you more per item because they know you are gonna want it but if there are tons of that one item they there kinda like eh then you think oh I can live without that....... Hope this helps

7 0
2 years ago
Read 2 more answers
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