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3 years ago

The sum of five times a number and four is equal to negative eleven. What is the number?

Mathematics

2 answers:

Nadya [2.5K]3 years ago

5 0

Answer:

n=-3

Step-by-step explanation:

Move all terms that don't contain n to the right side and solve.

Write out he equation as 5n+4=-11.

Greeley [361]3 years ago

4 0

Answer:

-3

Step-by-step explanation:

Create a formula:

-11=5x+4

Now we simplify the equation to get x all alone:

Subtract 4 from both sides:

-15=5x

Divide both sides by 5:

-3=x

I hope this helps u, pls give a brainliest and a thx ;)

Let me know in comments if you have any questions or concerns with my answer

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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

3 years ago

Twenty percent of 150 is

Svetlanka [38]

20% of 150 is 30

Change the percentage into a decimal by dividing it over 100:

20 / 100 = 0.2

Multiply:

0.2 × 150 = 30

6 0

3 years ago

PLEASE HELP ME WHAT AM I SUPPOSE TO DO?!

stepladder [879]

Answer:

Step-by-step explanation:

Angle 2= 50

angle 1= 180-50= 130 degrees (linear pair (sum 180))

angle 3= 130 degrees (vertically oposite angles are equal)

angle 6= 130 degrees (alternate interior angles)

angle 5= 180-130= 50 degrees (linear pair)

i hope this helps :)

8 0

3 years ago

2) If one variable increases in value and the other variable decreases in value, the variables have a(n) ________ relationship.

max2010maxim [7]

Answer:

inverse

Step-by-step explanation:

3 0

3 years ago

The height of a cone is twice the radius of its base.

riadik2000 [5.3K]

Answer:

⅔πx³

Step-by-step explanation:

The formula for the volume of a cone is

V = ⅓πr²h

Let x = radius of base.

Then 2x = height, and

V = ⅓πx²·2x = ⅔πx³

6 0

3 years ago