What are the coordinates of the vertex of y = x2 – 2x

What is the formula for the confidence interval? Then, define what each variable represents.

Alisiya [41]

The confidence interval for a (1−α)% confidence level is given by

(θ0−Zα/2 σ/√n, θ0+Zα/2 σ/√n)

θ0 is the measured statistic, Zα/2 is the cutoff/critical value, and σ/√n is the standard error. σ is the population standard deviation (if known) or can be estimated by a sample standard deviation. n is the sample size. The cutoff value depends on the test you wish to use, and θ0 depends on the statistic you wish to estimate.

7 0

3 years ago

How to solve this problem step by step. Make brainliest answer if its done. Please

sladkih [1.3K]

D is halfway between A and B

so the coordinates of D are (2,2)

E is halfway between A and C so the coordinates of E are (-1,1)

now you need to find the gradient/slope of DE and BC using the formula:

$\frac{y2 - y1}{x2 - x1}$

<h3>Gradient of DE: </h3>

SUB IN COORDINATES OF D AND E

$\frac{1 - 2}{ - 1 - 2}$

therefore the gradient of DE is 1/3.

<h3>Gradient of BC:</h3>

SUB IN COORDINATES OF B AND C

 $\frac{ - 2 - 0}{ - 3 - 3}$ 

therefore the gradient of BC is -2/-6 which simplifies to 1/3.

<h3>therefore, BC and DE are parallel as they both have a gradient/slope of 1/3 and parallel lines have the same gradient</h3>

6 0

3 years ago

You are planning a trip to Yellowstone National Park, and know that you can save money by driving

svp [43]

Answer:

the number of miles that you would drive to go the yellowstone is 814 miles

Step-by-step explanation:

The computation of the number of miles that you would drive to go the yellowstone is shown below:

= First leg of the journey from portland + more drives to yellow stone

= 426 miles + 388 miles

= 814 miles

Hence, the number of miles that you would drive to go the yellowstone is 814 miles

7 0

3 years ago

Jenna starts with $50 and she sells her homemade cookies for $2 each. Elijah starts with $32 and he sells his homemade cookies f

GuDViN [60]

Answer:

if Jenna sold none, Elijah would sell 6... C=6

Step-by-step explanation:

Add 6 to 32

6 0

2 years ago

What is the quotient of 5 7 ÷ 5 14 ?

KatRina [158]

Answer:

<h2>= 57 / 514 (Decimal: 0.110895)</h2>

Step-by-step explanation:

57 / 514

= 57 / 514

(Decimal: 0.110895)

<h2>And if that is not what you are looking for here: </h2><h2></h2>

Rewrite the equation as

x /14 = 5/ 7 . x/ 14 = 5/ 7

Multiply both sides of the equation by

14.14 ⋅ x /14 = 14 ⋅ 5 /7

Simplify both sides of the equation.

Tap for fewer steps...

Cancel the common factor of 14 .

Cancel the common factor.

14 ⋅ x /14 = 14 ⋅ 5 /7

Rewrite the expression.

x = 14 ⋅ 5 /7

Simplify 14 ⋅ 5/ 7 .

Cancel the common factor of 7 .

Factor 7 out of 14 .

x = 7 ( 2 ) ⋅ 5/ 7

Cancel the common factor.

x = 7 ⋅ 2 ⋅ 5/ 7

Rewrite the expression.

x = 2 ⋅ 5

Multiply 2 by 5 .

x = 10

3 0

2 years ago

What are the coordinates of the vertex of y = x2 – 2x – 7?