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3 years ago

Muitiply (2n+2)(2n-2)

Mathematics

2 answers:

3241004551 [841]3 years ago

7 0

Answer:

4n^2-4

Step-by-step explanation:

You do FOIL

FIRST

OUTER

INNER

LAST

2n times 2n

2n times -2

2 times 2n

2 times -2

then add if needed.

belka [17]3 years ago

3 0

Answer:

4n2−4

Step-by-step explanation:

2n(2n)+2n⋅−2+2(2n)+2⋅−2

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the wind on any random day in bryan is normally distributed with a standard deviation of 5.1 mph. a sample of 16 random days in

Karolina [17]

The 98% confidence interval estimate of the population mean is

15.823 < μ < 22.177

In the given situation the wind on a random day in Bryan is normally distributed with the following values;

Standard Deviation = ( δ ) = 5.1 mph

A random day of 16 is taken into account for the consideration of Bryan's average value of 19mph.

n = 16

By taking the confidence level of T - Factor, we get the;

At a 98% confidence level, the t is,

tα /2,df = t₀.₀₄,₂₄ = 2.492 ( df = hours in a day)

Margin of error = E = tα/2,df * (δ /√n)

= 2.492 * (5.1 / √16)

= 3.177

The 98% confidence interval estimate of the population mean is,

x - E < μ < x + E

19 - 3.177 < μ < 19 + 3.177

15.823 < μ < 22.177

The 98% confidence interval estimate of the population mean is

15.823 < μ < 22.177

To learn more about Standard Deviation click here:

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2 years ago

Using the right triangle below. What is the name for side AB?

OleMash [197]

Answer:

hypotenuse is the correct answer

7 0

3 years ago

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A rocket is 1 mile above the earth in 30 seconds and 5 miles above the earth in 2.5 minutes. What is the rockets rate of change

Aleksandr-060686 [28]

<span>The constant rate of change is 30 seconds because:
1 mile=30 seconds
2 miles=1 minute
3 miles=1 minute and 30 seconds
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6 0

3 years ago

PLEASE HELP DUE SOON

shutvik [7]

Answer:

y < x + 5

Step-by-step explanation:

Determine the equation of the broken line in slope- intercept form

y = mx + c ( m is the slope and c the y- intercept )

Calculate m using the slope formula

m = $\frac{y_{2}-y_{1} }{x_{2}-x_{1} }$

with (x₁, y₁ ) = (- 5, 0) and (x₂, y₂ ) = (0, 5)

m = $\frac{5-0}{0+5}$ = $\frac{5}{5}$ = 1

note the line crosses the y- axis at (0, 5) ⇒ c = 5

y = x + 5 ← equation of broken line

Thus y < x + 5 is the inequality for the graph

5 0

4 years ago

Find the equation of the line with a slope of -1/3 that passes through the point (-1,-2). Give your answers in point-slope form,

Roman55 [17]

Answer:

y=-1/3x-7/3

Step-by-step explanation:

y-y1=m(x-x1)

m=-1/3

y-(-2)=-1/3(x-(-1))

y+2=-1/3(x+1)

y=-1/3(x+1)-2

y=-1/3x-1/3-2

y=-1/3x-1/3-6/3

y=-1/3x-7/3

5 0

4 years ago