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Shkiper50 [21]
2 years ago
12

If you need to divide 2/3 by 4/5 , why is it easier to use an equation than to use a model

Mathematics
1 answer:
Kryger [21]2 years ago
8 0
Now you see when you use a model it is harder kepause........
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8x+3y= 28 and 7x-3y=2<br>solve for x and y simontaniasly using elimination ​
EleoNora [17]

Answer:

x=2, y=4

Step-by-step explanation:

When using elimination, the objective is to elimate one variable. In this case, we see that "y" can easily be eliminated by adding the two equations together since you will get 3y + (-3y) which will eliminate y because the value would become 0, letting us solve for x.

\left \{ {{8x+3y=28} \atop {7x-3y=2}} \right. +\\

Then we get

15x =30, because the y's will eliminated, and 8x+7x is 15x, and 28+2 is 30.

Then divide by 15 on both sides and you get x=2

If x=2, then we can substitute that value into any of the previous given equations and find the value of y.

8×2 +3y = 28

16+3y=28

3y=12

y=4

So the answer to your system of equations would be x=2, and y=4

You can substitute the answers we found to see that they satisfy the equation.

Hope this helped.

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2 years ago
What is i^30?<br>0A. -i<br>0B. -1<br>0C. 1<br>0D. i​
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Answer:   B

Step-by-step explanation:

-1 will be your answer. (B)

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If I put 4,736 marbles into groups of 10 how many groups would I have
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