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krok68 [10]
3 years ago
10

Which number is irrational, an integer, and a real number?

Mathematics
1 answer:
Montano1993 [528]3 years ago
6 0

name me some numbers plz

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What is the solution to this system of equations?
Ede4ka [16]

Answer:

First choice.

Step-by-step explanation:

You could plug in the choices to see which would make all the 3 equations true.

Let's start with (x=2,y=-6,z=1):

2x+y-z=-3

2(2)+-6-1=-3

4-6-1=-3

-2-1=-3

-3=-3 is true so the first choice satisfies the first equation.

5x-2y+2z=24

5(2)-2(-6)+2(1)=24

10+12+2=24

24=24 is true so the first choice satisfies the second equation.

3x-z=5

3(2)-1=5

6-1=5

5=5 is true so the first choice satisfies the third equation.

We don't have to go any further since we found the solution.

---------Another way.

Multiply the first equation by 2 and add equation 1 and equation 2  together.

2(2x+y-z=-3)

4x+2y-2z=-6 is the first equation multiplied by 2.

5x-2y+2z=24

----------------------Add the equations together:

9x+0+0=18

9x=18

Divide both sides by 9:

x=18/9

x=2

Using the third equation along with x=2 we can find z.

3x-z=5 with x=2:

3(2)-z=5

6-z=5

Add z on both sides:

6=5+z

Subtract 5 on both sides:

1=z

Now using the first equation along with 2x+y-z=-3 with x=2 and z=1:

2(2)+y-1=-3

4+y-1=-3

3+y=-3

Subtract 3 on both sides:

y=-6

So the solution is (x=2,y=-6,z=1).

8 0
3 years ago
Find x.<br> A. 2<br> B. 1<br> C. 1.6<br> D. 0.9
Brilliant_brown [7]

8x - 1 = 3x + 9 (☆ Corresponding Angle)

or, 5x = 10

or, x = 10/5

★ x = 2

This is a Right answer....

I hope you understand....

Mark me as brainliest....

Thanks...

5 0
3 years ago
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storchak [24]
<h2><em>Jenny had 58 and Susan had 41.</em></h2>
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3 years ago
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The standard deviation for a set of data is 8.5. The mean is 215.
mixas84 [53]
The answer to your question is 2.5 hope this helps
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$500 at 4% for 3 years <br> :FIND THE INTEREST EARNED
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Answer:60$

Step-by-step explanation:

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