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sesenic [268]
3 years ago
5

Please help me!!! Solve the system by substitution. y=-x -2x+5y=-28

Mathematics
2 answers:
STALIN [3.7K]3 years ago
7 0
This is how I solved it !! Hope it helped , if you got any question about any step please let me know ;)

Elena-2011 [213]3 years ago
4 0

Answer:

(4,-4)

x=4

y= -4

Step-by-step explanation:

We know that y is equal to and so we can plug the y value in for x into the other equation

-2x+5(-x)= -28

Solve for x

-2x-5x= -28

-7x= -28

x=4

Now that we know that x= -4 we can plug this into one of the two starting equations and solve for y

y= -(4)

y= -4

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Square root of 2 divided by the cube root of 2
kifflom [539]

Answer: \sqrt[6]{2}

Step-by-step explanation:

You know that the expression is \frac{\sqrt{2}}{\sqrt[3]{2}}

By definition we know that:

\sqrt[n]{a}=a^{\frac{1}{n}

You also need to remember the Quotient of powers property:

\frac{a^n}{a^m}=a^{(n-m)}

Therefore, you can rewrite the expression:

=\frac{2^{\frac{1}{2}}}{2^{\frac{1}{3}}}

Finally, you have to simplify the expression. Therefore, you get:

=2^{(\frac{1}{2}-\frac{1}{3})}\\=2^{\frac{1}{6}}\\=\sqrt[6]{2}

5 0
3 years ago
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mestny [16]

Answer:

x=1

Step-by-step explanation:

To solve this question we will have to open the bracket first

So let's solve

3(x-5)=18

Open the bracket

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7 0
3 years ago
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Points D and E are midpoints of the sides of triangle ABC. The perimeter of the triangle is 48 units.
Kipish [7]

9514 1404 393

Answer:

  A.  2

Step-by-step explanation:

The perimeter is the sum of the side lengths:

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  42 = 21t . . . . . . . . . . . . . . . . . . . collect terms, subtract 6

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7nadin3 [17]

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Step-by-step explanation:

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Pls help me !!
Leto [7]
<h3>Answer:  28</h3>

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One slice is 7 square inches, so all four slices combine to 7*4 = 28 square inches

5 0
2 years ago
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