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3 years ago

Solve for substitution of Y=x-1 and 2x-y=0

2 answers:

8 0

Step One: Plug in (x-1) for y in 2x-y = 0
$2x-(x-1)=0$
Step Two: Distribute the negative
 $2x -x -(-1)=0 \\ 2x-x+1=0$
Step Three: Add like terms on one side of the equation
$x + 1=0$
Step Four: Subtract 1 from both sides
$x+1-1=0-1 \\ x = -1$
Step Five: Plug x into one original equation (I chose y=x-1 but you can do either one)
$y=x-1 \\ y=-1-1 \\ y=-2$
That's the answer to the problem, x = -1, y = -2 (-1,-2)!
Hope this helps!

satela [25.4K]3 years ago

8 0

Step One: Plug in (x-1) for y in 2x-y = 0

Step Two: Distribute the negative

Step Three: Add like terms on one side of the equation

Step Four: Subtract 1 from both sides

Step Five: Plug x into one original equation (I chose y=x-1 but you can do either one)

That's the answer to the problem, x = -1, y = -2 (-1,-2)!
Hope this helps!

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If 8=56 7 =42 6=30 5=20 what does 3=

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4·3=12⇒4=12
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3 years ago

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4 years ago

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What is 160 rounded to the nearest hundred

VashaNatasha [74]

Answer:

♡ madeline here ♡

the answer is 200, stay safe!

✧･ﾟ: *✧･ﾟ:･ﾟ✧*:･ﾟ✧･ﾟ

Step-by-step explanation:

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3 years ago

How do u write 20,484,163 in expanded form

Lubov Fominskaja [6]

Expanded form is when you take a number, and add its digits together, reforming the number. For example, 1,523 would be 1,000 + 500 + 20 + 3
Here are a few examples:
2,000 + 400 + 50 + 7 = 2,457
200,000 + 700 + 10 + 2 = 200,712
50,000 + 800 + 50 + 6 = 50,856
60,000,000 + 200,000 + 50,000 + 1,000 + 400 + 20 + 3 = 60,251,423

So, 20,484,163 is equal to

20,000,000 + 400,000 + 80,000 + 4,000 + 100 + 60 + 3 = 20,484,163

I hope I helped!
~Olivia

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3 years ago

A distance AB is observed repeatedly using the same equipment and procedures, and the results, in meters, are listed below: 67.4

skad [1K]

Answer:

a) $\bar X =\frac{67.401+67.400+67.402+67.396+67.406+67.401+67.396+67.401+67.405+67.404}{10}=67.401$

b) The sample deviation is calculated from the following formula:

$s=\sqrt{\frac{\sum_{i=1}^n (X_i -\bar X)^2}{n-1}}$

And for this case after replace the values and with the sample mean already calculated we got:

$s=0.0036$

If we assume that the data represent a population then the standard deviation would be given by:

$\sigma=\sqrt{\frac{\sum_{i=1}^n (X_i -\bar X)^2}{n}}$

And then the deviation would be:

$\sigma =0.00319$

Step-by-step explanation:

For this case we have the following dataset:

67.401, 67.400, 67.402, 67.396, 67.406, 67.401, 67.396, 67.401, 67.405, and 67.404

Part a: Determine the most probable value.

For this case the most probably value would be the sample mean given by this formula:

$\bar X =\frac{\sum_{i=1}^n X_i}{n}$

And if we replace we got:

$\bar X =\frac{67.401+67.400+67.402+67.396+67.406+67.401+67.396+67.401+67.405+67.404}{10}=67.401$

Part b: Determine the standard deviation

The sample deviation is calculated from the following formula:

$s=\sqrt{\frac{\sum_{i=1}^n (X_i -\bar X)^2}{n-1}}$

And for this case after replace the values and with the sample mean already calculated we got:

$s=0.0036$

If we assume that the data represent a population then the standard deviation would be given by:

$\sigma=\sqrt{\frac{\sum_{i=1}^n (X_i -\bar X)^2}{n}}$

And then the deviation would be:

$\sigma =0.00319$

3 0

4 years ago