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nevsk [136]
3 years ago
8

PLEASE HELP ASAP!!!!!!!!!

Mathematics
1 answer:
serg [7]3 years ago
6 0
A.(2,3)
B.(5,5)
C.(7,3)
D.(5,2)

Can someone help meh. Trying to reach Ace tank.
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First box: division sign

Second box: 3, 15 or, 4

Third box: 1/4,3/4, or 16/76

Step-by-step explanation:

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Simplify 5(x-6). A.)-x<br> B.)5x-6<br> C.)10x-30
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Expand the following 2(x+3)
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What is the answer a, b, c, or d
podryga [215]

Answer: Choice B

(-2, 5)

==================================================

Explanation:

The original system is

\begin{cases}-4x+3y = 23\\ x-y = -7\end{cases}

Multiply both sides of the second equation by 3. Doing so leads to this updated system of equations

\begin{cases}-4x+3y = 23\\ 3x-3y = -21\end{cases}

Now add straight down

The x terms add to -4x+3x = -1x = -x

The y terms add to 3y+(-3y) = 0y = 0

The terms on the right hand sides add to 23+(-21) = 2

We end up with the equation  -x = 2 which solves to x = -2

Now use this to find y. You can pick any equation with x,y in it

----------------

-4x+3y = 23

-4(-2)+3y = 23

8+3y = 23

3y = 23-8

3y = 15

y = 15/3

y = 5

Or

x-y = -7

-2-y = -7

-y = -7+2

y = -5

y = 5

Either way, we get the same y value.

So that's why the solution is (x,y) = (-2, 5)

6 0
3 years ago
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