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MaRussiya [10]
3 years ago
12

can some one explain to me how fractions work who ever explains it well gets brainliest, adding, subtracting, multiplying, divid

ing
Mathematics
1 answer:
Ludmilka [50]3 years ago
4 0
Adding: When adding fractions, you want to make sure that the denominator is the same for both fractions. If they are already the same, just add both the numerators to get the answer. For example,
\frac{3 }{5}  +  \frac{1}{5}  =  \frac{4}{5}
If the denominator is different in both fractions, you have to find the least common denominator, or LCD. The LCD is the smallest number that both denominators can multiply into. For example, say you need to find
\frac{1}{6}  +  \frac{1}{3}

Multiply both the numerator and the denominator of (1/3) by 2 to get (2/6). This way, the denominators are the same and you can find the answer.
\frac{1}{6}  +  \frac{2}{6}  =  \frac{3}{6}
In the case that one denominator does not go into the other, find the smallest number they both multiply into. For example,
\frac{1}{3 }  +  \frac{1}{4}
Here, the smallest number that both 4 and 3 multiply into is 12. Multiply both fractions by the correct amount to make both denominators 12. It would then become
\frac{4}{12}  +  \frac{3}{12}  =  \frac{7}{12}
Subtraction: follow the same rules as addition, except subtract the numerators instead of adding them.

Multiplication: multiply both numerators and both denominators.
\frac{2}{3}  \times  \frac{4}{5}  =  \frac{8}{15}
Division: Flip one of the fractions and multiply.
\frac{2}{3}   \div   \frac{4}{5}
Becomes
\frac{2}{3}  \times  \frac{5}{4}  =  \frac{10}{12}  =  \frac{5}{6}
Hope this explains it all. Let me know if you have any questions :)
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You have decided to buy a new car, but you are concerned about the value of the car depreciating over time. You do some research
____ [38]
<span>The answer should be set up like so: 

3125 = 3200*(d)^3 
3125/3200 = d^3 
3-root (3125/3200) = d 
d = 0.992125657... 

1 - d = 0.007874... 
Therefore it depreciates at about 0.8% monthly 

To find the depreciation 6 months from now, or 9 months from the beginning: 
v = 3200 (d)^9 
= 2980.232239... 

So after 9 months the car would be about $2980.23</span><span>
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6 0
3 years ago
Read 2 more answers
For three consecutive years, Sam invested some money at the start of the year. The first year, he invested x dollars. The second
wariber [46]
To answer we let x be the amount of money that Sam invested during the first year. 

Below are the expressions translated from the given word forms for the amount invested.

Sam:
2nd year :   amount = 5x/2 - 2000
3rd year  :   amount = x/5 + 1000

The sum of money invested by Sam is:
  x + (5x/2 - 2000) + (x/5 + 1000)

Similarly, we derive the expressions that we use for the amount that Sally invested.
Sally
1st year  :    amount  = 3x/2 - 1000
2nd year :    amount = 2x - 1500
3rd year :     amount = x/4 + 1400

The total amount that Sally invested is, 
        total = (3x/2 - 1000) + (2x - 1500) + (x/4 + 1400)

Equating the two equations:
 (x) + (5x/2 - 2000) + (x/5 + 1000) = (3x/2 - 1000) + (2x - 1500) + (x/4 + 1400)

 Solving for x,
               x = 2000
For Sally's investment in the third year:
    amount = x/4 + 1400 = (2000/4 + 1400) = 1900

ANSWERS: 
  Sam's first year = $2000
  Sally's third year = $1900
3 0
3 years ago
Help this this is due today
Olegator [25]

Answer:

x=3

Step-by-step explanation:

Simplify 3(x-2)+5X

= 8x-6=18

Add 6 to both sides

8x=24

Divide by 8

x=3

7 0
2 years ago
2x7+2 ?<br> What does x =
Zarrin [17]
The x is the variable so you have to find what the equation equals in order too find out what variable x is.  2 x7+2 = 16. So now x = 16
8 0
3 years ago
What are the solutions of x^2 + 10x+16=0
Digiron [165]

Answer:

x=−2,−8

Step-by-step explanation:

Move terms to the left side. Then set each factor equal to zero.

x=−2,−8

5 0
3 years ago
Read 2 more answers
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