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3 years ago

The standard deviation assumes a negative value when

Mathematics

1 answer:

rosijanka [135]3 years ago

8 0

... when the universe grows cold. (Or someone made a typesetting mistake.)

Standard deviation is the square root of a non-negative number. It will NEVER be negative.

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What is the average of 27 and 45?

vivado [14]

65 or I am not so sure

6 0

3 years ago

Find all possible values of x if these represent side of a triangle 2x,5-x,4

3241004551 [841]

Answer:

-1/3 < x < 3 or x = (-1/3, 3)

Step-by-step explanation:

Given sides of a triangle:

2x, 5 - x, 4

Triangle inequality theorem:

Any side is smaller than the some of the other two.

Apply to the given triangle:

2x + 5 - x > 4 ⇒ x > -1
2x + 4 > 5 - x ⇒ 3x > -1 ⇒ x > -1/3
5 - x + 4 > 2x ⇒ 3x < 9 ⇒ x < 3

Combine all the inequalities:

-1/3 < x < 3
x = (-1/3, 3)

7 0

3 years ago

Helpppppppp meeeeeeeeeeeeeeeeeeee

Alex73 [517]

Answer:

The length of the shorter piece is $5\textrm{ ft}$ .

The length of the longer piece is $11\textrm{ ft}$ .

Step-by-step explanation:

The five-step method is GUESS method.

Given:

Length of steel beam, $L=16\textrm{ ft}$

Length of longer piece is 1 foot longer than twice the shorter one.

Unknown:

Length of longer and shorter pieces of beam.

Let the length of shorter piece be $x$ feet.

Therefore, the length of longer beam is equal to $1+2x$

Evaluate:

Sum of lengths of longer and shorter pieces of beam is equal to the total length of beam. So,

$x+1+2x=16\\3x+1=16\\3x=16-1\\3x=15\\x=\frac{15}{3}=5$

Substitute and Solve:

Now, we have, $x=5$ .

Substitute 5 for $x$ for the lengths of shorter and longer pieces and solve for each. This gives,

Length of shorter piece = $x=5\textrm{ ft}$

Length of longer piece = $1+2x=1+2(5)=1+10=11\textrm{ ft}$

Therefore, the lengths of shorter and longer pieces are $5\textrm{ ft}$ and $11\textrm{ ft}$ respectively.

6 0

4 years ago

What is the y-intercept of the graph of the line whose equation is y=-2/5x+4?

s2008m [1.1K]

Answer:

b = 4

Step-by-step explanation:

y = mx + b represents the equation of a line

m represents the slope

b represents the y-intercept

Based on what we're given, we could determine that 4 is our y-intercept or b.

3 0

3 years ago

Read 2 more answers

Find an equation for the line that passes through the points (-6, 3) and (6, -6).

MrRissso [65]

Slope=-9/12 = -3/4

y=mx+b y=-3/4x+b

3=-3/4(-6)+b

b=3+9/2=7.5

Equation is y=-0.75x+7.5

7 0

2 years ago

Read 2 more answers