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Harman [31]
3 years ago
8

Cómo se resuelven las ecuaciones químicas?

Mathematics
1 answer:
prohojiy [21]3 years ago
4 0

Answer:

La ecuación química necesita ser equilibrada para que siga la ley de conservación de la masa.

Step-by-step explanation:

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Horses cost $10, pigs cost $3, and rabbits are only $0.50. a farmer buys 100 animals for $100. how many of each animal did he bu
Oksanka [162]
You can use the following equation:

10h+3p+0.5r=100

This equation uses “h” “p” and “r” to represent the number of animals bought, each variable having a coefficient which is that animal's price. The right side is the total price.

You will now need a second equation so you can proceed to substitution/elimination:

h+p+r=100

This equation, using the same variables, represents the total number of animals to be bought.

We can eliminate the “h” variable by multiplying the bottom equation by -10, you now have the following:

10h+3p+0.5r=100

-10h-10p-10r=-1000

Add down and the result is:

-7p-9.5r=-900

You can set up a proportion

-9.5r=-900+7p

r=(-900+7p)/-9.5

And substitute in the original equation…

P.S. I challenge you to figure out the rest on your own because it is really just a tedious process of substitution and elimination from here and my phone is about to die. I'll check in later if you're still having problems.
8 0
4 years ago
Randy can buy 6 gallons of gas for $18 or 7 gallons of gas for $21. how much do you think he would pay for 8 gallons of gas?
lesantik [10]

18/6 = 3 dollars per gallon

8 x 3 = 24

 8 gallons would cost $24

answer is C

6 0
3 years ago
Read 2 more answers
If A represent the number of apples purchased at 15 cents each, and B represents the number of bananas purchased at 10 cent each
DiKsa [7]
We have A number of apples, each purchased at 15 cents.
We can, thus, calculate the total cost of apples as follows:
Total cost of apples = 15A cents

We have B number of bananas, each purchased at 10 cents.
We can, thus, calculate the total cost of bananas as follows:
Total cost of bananas = 10B cents

Now, the total cost of purchases can be calculated by adding the amount paid for  both types (apples and bananas) as follows:
Total cost = cost of apples + cost of bananas = 15A + 10B cents
8 0
4 years ago
1. If the ratio of dogs to cats is 7 to 3, this means...
lys-0071 [83]

Answer:

D. For every 7 dogs, there are 3 cats.

Step-by-step explanation:

7 0
3 years ago
Read 2 more answers
The eight term of a geometric progression is given by Sn= -[-3(sin^2x + cos^2x)^n + In e. Find the first term and common ratio.​
igor_vitrenko [27]

Answer:

Step-by-step explanation:

Sn= -[-3(sin^2x + cos^2x)^n + In e.

sin^2x + cos^2x = 1  and ln e = 1, so

Sn = -(-3)^n + 1

When n = 8

this = -(-3)^8 + 1

7 0
3 years ago
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