In the hormone replacement studies of menopausal women, doctors rejected the results of the observational study after conducting the experiment. In the experiment they controlled the effects of confounding variables that had probably influenced the results in the observational study. In the experiment the doctors used random assignment to treatment groups, a placebo, and double blinding to control the effects of confounding variables. Which of the following are potential confounding variables? Check all that apply.
A. whether a woman took hormones
B. whether a woman in the study had a heart attack
C. wealth
D. access to health care

Answer:

Midpoint of AB              = (0 + 2a / 2 , 0 + 0 / 2) = (2a / 2 , 0 / 2) = (a,0)

x coordinate of point c = a

                                  N = (0 + a / 2 , 0 + b / 2) = (a / 2 , b / 2)

                                  M = ( 2a + a / 2 , 0 + b / 2) = (3a / 2 , b / 2)

                                MA = √(3a / 2 - 0)² + b / 2 - 0)²

                                       = √(3a / 2 )² + (b / 2) = 9a² / 4 + b² / 4

                                NB = √(a / 2 - 2a)² + (b / 2 - 0 )²

                                      = √( a / 2 - 4a / 2)² + (b / 2 - 0)²

                                      = √(-3a / 2)² + (b / 2)² = √9a² / 4 + b² / 4

Step-by-step explanation:

I tried my best hope its correct :0

Answer: 25

Step-by-step explanation: Divide the value of people by  12. ( mystery )

Answer:90

Step-by-step explanation:every 40 people there is 12 pwople who like mystery so you then up intill you cant no more so you will have 280 so you can add 12 any more but think again 20 people qquals to 6 mysery so if you add all of it together you will get 90

Answer:

Part A

1. After 4 weeks of work, Jeremy has saved 300

2. Jeremy worked 8 weeks in order to save $600

3. For every one week of work, Jeremy saved 75 dollars

4. If Jeremy works 15 weeks, then he can expect to save 1,125 dollars

Part B

1. Saeed orders 15 meals and his total cost of delivery is $24

2. Saeed paid $32 to have 20 meals delivered

3. For every meal delivered, Saeed is charged $1.6

4. If Saeed pays $19.20 in delivery fees then he ordered 12 meals

Step-by-step explanation:

Part A

The given graph gives the proportional relationship between total amount saved and the number of weeks worked

1. Reading from the graph, at the point where the vertical line from point 4 touches the line of the graph, an horizontal line to the vertical y-axis touches the y-axis at 300

Therefore;

After 4 weeks of work, Jeremy has saved 300

2. The point where an horizontal line from point 600 on the vertical y-axis touches the line of the graph, a vertical line drawn to the horizontal, x-axis touches the x-axis at 8

Therefore;

Jeremy worked 8 weeks in order to save $600.

3. The rate of change of the amount saved to the number of weeks worked, 'm', for the given proportional relationship (straight line relationship, passing through the origin) is given as follows;

Rate of change, m = Constant = y/x

∴ Rate of change of the amount saved to the number of weeks worked = (300-0)/(4 weeks- 0 week) = 75/week

Therefore;

For every one week of work, Jeremy saved 75 dollars

4. The amount Jeremy would have saved in 15 weeks, 'A', is given as follows;

A = m × n

Where;

m = The rate of change of the amount saved to the number of weeks worked = 75/week

n = The number of weeks worked

∴ A = 75/week × 15 = $1,125

Therefore;

If Jeremy works 15 weeks, then he can expect to save 1,125 dollars

Part B

From the graph, we have;

1. From the graph there is a proportional relationship between the total cost of delivery and the number of meals

At the point a vertical line drawn to the line of the graph from 15 on the horizontal axis (number of meals), a horizontal line drawn to the vertical y-axis touches the y-axis at 24

Therefore;

1. Saeed orders 15 meals and his total cost of delivery is $24

2. From the point where the horizontal line from 32 on the vertical axis touches the linear graph of the relationship between the total cost of delivery and the number of meals, a vertical line drawn down to the horizonal axis touches the horizontal x-axis at 20

Therefore;

Saeed paid $32 to have 20 meals delivered

3. The rate of change of the total cost of delivery to the number of meals, 'm', is given as follows;

m = y/x (for proportional relationships)

Taking any corresponding 'x' and y-values

m = 16/10 = 32/20 = 24/15 = 1.6 Dollars/meal

Therefore;

For every meal delivered, Saeed is charged $1.6

4. From m = y/x = 1.6

When y = $19.20

x = y/m = $19.20/($1.6/meal) = 12 meals

Therefore;

If Saeed pays $19.20 in delivery fees then he ordered 12 meals.

Hello!

This is a question about multiplying to get a polynomial answer.

Here we can use two strategies, which will get you the same strategy.

One is using a Punnett Square, and the other would be FOILing.

I personally like Punnett Squares, but I will use FOILing for the sake of being online.

FOIL stands for First, Outside, Inside, Last, which describes how the terms should be multiplied.

Let's multiply the first terms.

(-d + e)(4e + d)

[tex]-4de[/tex]

The outside terms.

(-d + e)(4e + d)

[tex]-d^2[/tex]

The inside terms.

(-d + e)(4e + d)

[tex]4e^2[/tex]

The last terms.

(-d + e)(4e + d)

[tex]de[/tex]

Now you just add them together to find the polynomial.

[tex]-d^2+4e^2-4de+de[/tex]

[tex]-d^2+4e^2-3de[/tex]

There are three terms in the product, and the product is degree 2, since the highest degree of the equation (the highest power any term is raised to) is 2.

Hope this helps!

B and E are the answers to find the product of (-d+e)(4e+d).

kkAnswer:

jkkjj

Step-by-step explanation:

Answer:

-10 3/4

Step-by-step explanation:

I think it's that

Answer:

-10 3/4:)

Step-by-step explanation:

Answer:

10

Step-by-step explanation:

12 x 2 = 24

2 x 2 = 4

10 x 2 = 20

20 + 4 = 24

I hope this helps!

Answer:

Step-by-step explanation:

its A)

Answer:

right and isosceles, but not equilateral

Step-by-step explanation:

two sides are equal~ isosceles

right angle~ 90 degrees

not equilateral because only two sides are equal

Answer:

1. 11x +11

3. 4x - 16

5. 4x + 14

2. -9x + 16

4. x

6. 18x - 15

Step-by-step explanation:

Answer:

x/2500=10/100

Step-by-step explanation:

The value of the computer after 10 years is represented by the function [tex]f(x) = 2500(0.9)^n[/tex]. The correct option is D.

The mathematical expression combines numerical variables and operations denoted by addition, subtraction, multiplication, and division signs.

Mathematical symbols can be used to represent numbers (constants), variables, operations, functions, brackets, punctuation, and grouping. They can also denote the logical syntax's operation order and other properties.

Given that Quinton just read that his new computer, which costs $2,500, loses 10% of its value every year.

The expression will be written as below,

[tex]f(x) = 2500(0.9)^n[/tex]

The function [tex]f(x) = 2500(0.9)^n[/tex] represents the computer's value after ten years.

To know more about an expression follow

https://brainly.com/question/9879583

#SPJ5

Given:

The graph of a line.

To find:

The slope of the graphed line.

Solution:

From the given graph it is clear that the line passes through the points (-2,2) and (2,5). So, the slope of the line is:

[tex]m=\dfrac{y_2-y_1}{x_2-x_1}[/tex]

[tex]m=\dfrac{5-2}{2-(-2)}[/tex]

[tex]m=\dfrac{3}{2+2}[/tex]

[tex]m=\dfrac{3}{4}[/tex]

Therefore, the slope of the given graphed line is [tex]m=\dfrac{3}{4}[/tex].

Answer:

126°

Step-by-step explanation:

hello :

234°=360°-126°..... so:

- 234°=-360°+126°

Answer:

C. 11

I hope it's right and helpful

Answer:

c 11

Step-by-step explanation:

c 20 hg ch gggggghubydyh

Answer:

The four small cones combined will hold more ice cream than the big one.

Step-by-step explanation:

Answer:

1 1/4 or 5/4

Step-by-step explanation:

one is simplified just in case

Answer:

1/1024

Step-by-step explanation:

If you want the steps, just ask and ill give them in comments :)

Hope this helped!

If so, can you mark brainiest!

Thanks!

Have a great day!

Answer:

12.54

Step-by-step explanation:

just multiply 12×0.045 and add the 12.

I hope and this helps.

Have a good day.

Good luck

Answer:

I assume you meant 4x^2

So the answer in simplified form is -4x^2-11x+3

Answer:

The horizontal value in a pair of coordinates: how far along the point is. The X Coordinate is always written first in an ordered pair of coordinates (x,y), such as (12,5). In this example, the value "12" is the X Coordinate.

Angel b=angle a+angle c-180

We have now proven that all three angles of ΔABC have a measure of 60 degrees. Therfore, ∠C must have a measure of 60 degrees

Answer:

x = -15, angle b = 115, angle c = 30.

Step-by-step explanation:

The 3 sides of a triangle add up to 180, so the equation will be

35 - 5 - 8x - 2x = 180

30 - 10x = 180

Subtract 30 from both sides.

-10x = 150

Divide by -10.

x = -15.

Finding angle b:

-5 - 8x

-5 - 8(-15)

-5 + 120

115

Finding angle c:

-2x

-2(-15)

30

To check it, we add angle a, angle b, and angle c together.

35 + 115 + 30

150 + 30

180.

Answer:

x = 6.

Step-by-step explanation:

x = 6  as its reflected about the vertical line passing through  the point (6,0).

Answer:

JK = 8

Step-by-step explanation:

Given 2 intersecting chords, then

The product of the measures of the parts of one chord is equal to the product of the measures of the other chord, that is

x(x + 4) = (x + 1)(x + 2) ← expand parenthesis

x² + 4x = x² + 3x + 2 ( subtract x² + 3x from both sides )

x = 2

Then

JK = x + 4 + x = 2x + 4 = 2(2) + 4 = 4 + 4 = 8

answer

= 10 and a dead body

ANSWER:10 apples and a ded body

Given:

The equation of a circle is:

[tex](x-3)^2+y^2=32[/tex]

To find:

Center and the circumference of the circle.

Solution:

The standard form of a circle is:

[tex](x-h)^2+(y-k)^2=r^2[/tex]         ...(i)

Where, (h,k) is center and r is the radius.

We have,

[tex](x-3)^2+y^2=32[/tex]           ...(ii)

On comparing (i) and (ii), we get

[tex]h=3,y=0,r=\sqrt{32}[/tex]

So, the center of the circle is (3,0) and the radius of the circle is [tex]\sqrt{32}[/tex].

Now, the circumference of the circle is:

[tex]C=2\pi r[/tex]

[tex]C=2(3.14)(\sqrt{32})[/tex]

[tex]C=35.525045[/tex]

[tex]C\approx 35.5[/tex]

Therefore, the circumference of the circle is about 35.5 units.

Answer:

2.3 hours per week

Step-by-step explanation:

Answer:

67°

Step-by-step explanation:

CHECK THE ATTACHMENT FOR THE FIQURE

From, trigonometry

tan(θ) = opposite/ adjacent

✓The helicopter is 665 feet from ground.

✓Distance of the helicopter and the line of sight of the girl will be the OPPOSITE SIDE, which is

(665ft - 5 ft)

= 600 ft

✓ from the figure, we can see the distance on the Horizontal side which is the ADJACENT SIDE as ( 280 ft)

✓angle of depression can be calculated as

tan(θ) = opposite/ adjacent

tan(θ)= (660/280)

tan(θ)= 2.357

tan-1=(2.357)

θ= 67°

Hence, angle of depression is 67°

Answer:

576 in. (the first one)

Step-by-step explanation: