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Deffense [45]
3 years ago
12

Solve the following system of equations:

Mathematics
1 answer:
Talja [164]3 years ago
8 0

Answer:

x=1,y=3

correct answer is (1,3)

Step-by-step explanation:

We can quickly eliminate y by subtracting one equation from the other

(-2x+y=1)-(-4x+y=-1)

2x=2

x=1

plug x=1 into equation 1

-2(1)+y=1

y=1+2=3

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Answer:

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Step-by-step explanation:

3 0
3 years ago
Read 2 more answers
Solve the system of equations. y = -5x + 24 y = 4x - 21 a. ( -5, -1) c. ( -1, 5) b. ( 5, -1) d. No solution
Svetlanka [38]

y = -5x + 24

y = 4x - 21

Since both of these equations are equal to Y, theyre equal to each other.

So we can make an equation with y = -5x + 24 in one side and y = 4x - 21 on the other.

-5x + 24 = 4x - 21

Now in order to get the value of x we need to isolate it in one side of the equation. We can do this by subtracting 24 from both sides of the equation:

-5x + 24 - 24 = 4x - 21 - 24

-5x = 4x - 45

Now we subtract 4x from both sides so the 4x shift to the other side

-5x - 4x = 4x - 4x - 45

-9x = -45

Finally divide both sides by -9 so x is by itself

(-9)÷(-9x) = -(45)÷(-9)

x = 5

Since we did all of this to BOTH sides of the equation, both sides are still equal to each other and the equation still is true.

Now apply x = 5 to either of the initial equations to find the value of Y

y = -5x + 24 or y = 4x - 21

(I'll do both but u only need one)

y = -5(5) + 24

y = -25 + 24

y = -1

y = 4(5) - 21

y = 20 - 21

y = -1

Either way, X is 5 and Y is -1

Answer (5, -1)

5 0
3 years ago
Simplify -x(4x^2 − 6x + 1)
12345 [234]

Answer:

-4x^3+6x^2-x

Step-by-step explanation:

1. Distribute the X across the equation: -x(4x^2)=-4x^3\\

2.-x(-6x)=6x^2

3.-x(1)=-x

3.-4x^3+6x^2-x

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2 years ago
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kenny6666 [7]
S + 4t = r
subtract 4t from both sides
s = r - 4t  answer
6 0
3 years ago
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1. Determine the approximate measure of angle E.
Naddik [55]

Answer:

1. 81.0

2. I`m trying to figure that out now I will give answers when I can

Step-by-step explanation:

7 0
3 years ago
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