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Arada [10]
4 years ago
5

-3x+3y=12 4x+2y=20 Please help its elimination. It's really hard I can't solve it

Mathematics
1 answer:
Karo-lina-s [1.5K]4 years ago
5 0
-3x + 3y = 12<u /> ⇒ -12x + 4y = 48
 4x + 2y = 20 ⇒   <u>12x + 6y = 60</u>
                                   <u>-2y</u> = <u>-12</u>
                                    -2      -2
                                      y = 6
                          4x + 2(6) = 20
                            4x + 12 = 20
                            <u>       -12  -12</u>
                                    <u> 4x</u> =<u> 8</u>
                                      4     4
                                       x = 2
                                 (x, y) = (2, 6)
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What is 520 divided by 8
erastova [34]
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Now subtract 48 from 52; 52-48= 4

Finally bring down the 0 next to the 4; 40

Now to get you final answer find out how many times can 8 go into 40; 5
Since it goes exactly 5 times then your final answer would be; 65
Hope this helps! :)
 
7 0
3 years ago
What's the probability you roll the same number twice on a regular dice?
jekas [21]
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4 0
4 years ago
How do u solve the system 3x+5y=8 2x-5y=-3
RSB [31]
Add both equations giving x=1
Sub back into any equation which gives you y=1
8 0
3 years ago
Please help Need help
Anettt [7]
This problem can be readily solved if we are familiar with the point-slope form of straight lines:
y-y0=m(x-x0) ...................................(1)
where 
m=slope of line
(x0,y0) is a point through which the line passes.

We know that the line passes through A(3,-6), B(1,2)

All options have a slope of -4, so that should not be a problem.  In fact, if we check the slope=(yb-ya)/(xb-xa), we do find that the slope m=-4.

So we can check which line passes through which point:

a. y+6=-4(x-3)
Rearrange to the form of equation (1) above,
y-(-6)=-4(x-3)  means that line passes through A(3,-6) => ok

b. y-1=-4(x-2) means line passes through (2,1), which is neither A nor B
   ****** this equation is not the line passing through A & B *****

c. y=-4x+6  subtract 2 from both sides (to make the y-coordinate 2)
   y-2 = -4x+4, rearrange
   y-2 = -4(x-1)  
   which means that it passes through B(1,2), so ok

d. y-2=-4(x-1)
   this is the same as the previous equation, so it passes through B(1,2), 
   this equation is ok.

Answer: the equation y-1=-4(x-2) does NOT pass through both A and B.
   
8 0
3 years ago
1b. $1 6​− 1 3​ Lin said the value of this expression is $ 1 6​. Is she correct? Explain or show your reasoning to prove your an
Brrunno [24]

Answer:

No she is not correct

Step-by-step explanation:

She is not correct because “value of expressions” mean the result which for this it is 16-13 =3 and she is wrong. please mark me brainly! Hope this helps! :D

4 0
3 years ago
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