A company wants to test a new brand of dog food that has added omega-3 oils for healthy, shiny coats.

The company selects two groups of volunteers who have dogs as pets. They give each person in both groups a month's supply of dog food. Each bag of dog food is unlabeled. One group is given the dog food with the added omega-3 oils, and the other group is given a brand of dog food without the added omega-3 oils. Both groups are asked to feed their dogs the food the company gave them and report whether they noticed an improvement in their dogs' coats.

Which statement is correct?

A.
The experiment is blinded because the volunteers in both groups and the company are all unaware of which group received the dog food with omega-3 oils.
B.
The experiment is not blinded because the volunteers in both groups and the company are all unaware of which group received the dog food with omega-3 oils.
C.
The experiment is blinded because the volunteers in both groups are unaware of which dog food they received.
D.
The experiment is not blinded because the volunteers in both groups are aware of which type of dog food they received.

We have

0 < π/12 < π/2

and

tan(π/12) = sin(π/12) / cos(π/12)

Both sin(x) and cos(x) are positive for 0 < x < π/2, so we expect tan(π/12) to also be positive.

Recall the double-angle identities for cosine,

cos²(x) = (1 + cos(2x)) / 2

as well as the Pythagorean identity,

tan²(x) = sec²(x) - 1

and by definition,

sec(x) = 1 / cos(x)

Putting everything together, we have

tan(x) = √(1 / cos²(x) - 1)

tan(x) = √(2 / (1 + cos(2x)) - 1)

Let x = π/12. Then 2x = π/6, and cos(π/6) = √3 / 2, so that

tan(π/12) = √(2 / (1 + cos(π/6)) - 1)

tan(π/12) = √(2 / (1 + √3 / 2) - 1)

tan(π/12) = √(4 / (2 + √3) - 1)

tan(π/12) = √(4 / (2 + √3) - (2 + √3) / (2 + √3))

tan(π/12) = √((2 - √3) / (2 + √3))

tan(π/12) = √(7 - 4 √3)

Answer:

3+3=6 , 4+4=8

Step-by-step explanation: Brainliest pls

Answer: c

Step-by-step explanation:

The pair of triangles that can be proven similar by the AA ~ Postulate is triangle AXB and QXR.

The correct option is (C).

When the ratio between two triangles' sides is the same and both triangles' angles are equal, a triangle is said to have two equal sides.

Given:

In figure C,

In triangle AXB and QXR

<BAX = <QRX (given)

<AXB = QXR (Vertical opposite angle)

So, AA similarity Criteria triangle AXB and QXR is similar.

Hence, Figure C is following AA similarity.

Learn more about similarity of  triangles here:

https://brainly.com/question/14926756

#SPJ2

Answer:

Step-by-step explanation:

A rational number is a number that can be written in the form [tex]\frac{a}{b}[/tex] where b ≠ 0.

In order to properly arrange the numbers on the number line, we need to arrange it in an ascending order.

6/3 = 2

-3/4 = -0.75

1.5 = 1.5

0.25 = 0.25

-5.4 = -1.25

The numbers written in an ascending order will be,

-1.25 = -5/4

-0.75 = -3/4

0.25

1.5

2 = 6/3

Therefore writing this on the number line, we will have it in this order:

-1.25, -0.75, 0.25, 1.5, 2

Answer:

tgulriao e jkbal2 3n

Step-by-step explanation:

Answer:

angles 3, 1, 7, 5

Step-by-step explanation:

suplementary angles add up to 180 degrees so

<4 + <3=180

<4 + <1 =180

<4 + <7=180

<4 + <5= 180

Answer:

$5.5

Step-by-step explanation:

you have divide 22 by 4 after that you get 5.5

Answer:

Step-by-step explanation:

i think it is 12 for $9.99

9514 1404 393

Answer:

  n² -n +1

Step-by-step explanation:

First differences of the terms of the sequence are ...

  3-1 = 2

  7-3 = 4

  13-7 = 6

  21-13 = 8

Second differences are ...

  4-2 = 2

  6-4 = 2

  8-6 = 2

In a quadratic sequence the coefficient of the squared term is half of the second difference value. Here, that means the squared term will be (2/2)n² = n².

__

We can find the other terms of the quadratic expression by considering the differences between n² and the actual sequence.

The sequence of n² terms is ...

  1, 4, 9, 16, 25

When we subtract these from the actual sequence, we get ...

  1-1 = 0

  3-4 = -1

  7-9 = -2

  13-16 = -3

  21-25 = -4

That is, the amount subtracted from n² is one less than the term number.

The expression for the n-th term is ...

  an = n² -n +1

Answer:

6743÷110 = 67.43÷1.1........... thanks

Your answer is C because that shows the description of what they're asking.

Answer:

A:8

Step-by-step explanation:

Because it says how much money was earned from a teacher. And only 1 teacher bought an $8 ticket.

Answer:

2. 9x+4y=16

    -9x        -9x

4y=-9x+16

----  ----  ----

4      4      4

y= -9x

     --- +4

      4

4. 4x+3y=-9

  -4x         =4x

     3y=-4x-9

     ---    --- ---

     3       3  3

y= -4x

    ---- - 3

      3

6. 7x-3y=6

  -7x      -7x

       -3y=-7x+6

        ---  ----   ---

       -3    -3    -3

y= 7x

   --- -2

    3

Answer:

$1.50 per popsicle and $7.50 for 5 popsicles

Step-by-step explanation:

$4.50 divided by the mumber of posicles so 3 which is 1.5 them multiply by 5 to get the price of 5 popsicles.

Answer:

The answer is 6/49, I hope this helps.

Answer: 2 1/9

Step-by-step explanation: There are 2 1/9‘s left when you see how many can fit into the last 1/3 box. But if the answer is not 2 1/9 than the answer is 2.

Answer: here are some examples :

8-1 9^

-2 9^

8/9^

4 9^

8/9^

10 9^

-6 x 9^

3 9^5 x 9^-7

Step-by-step explanation: pls mark branliest

Answer:

20

Step-by-step explanation:

a negative times anegative is a postive

-10× -2= +20

Answer:

A

Step-by-step explanation:

Been a while since i’ve done this but I’ pretty sure since A starts on 2 and goes back 7 (into the negatives for minus 7) it would be A.

Answer:

I hope this helps!

Answer:

7 and 1/15

Step-by-step explanation:

4+2 then add two fifths with two thirds (convert them into a mixed number)

Write the mixed number as a sum of the whole number (6+1 1/15)

6+1 is 7

answer is 7 1/15

Answer:

10 minutes

Step-by-step explanation:

Answer:

Immediately after she ran the mile, her heart rate was 100 beats per minute.

Step-by-step explanation:

If Kim ran a mile in Physical Education class, and after one hour of rest her heart rate was 60 beats per minute, having dropped 2/5 of the pace it had immediately after finishing running, to know what was said heart rate it is necessary to perform the following calculation:

2/5 = 0.4

Thus, her heart rate dropped 40%. Since 100-40 is equal to 60, your 60 beats are 60% of the heart rate immediately after running. Therefore, the post-exercise heart rate is derived from the following calculation:

60 = 60

100 = X

((100 x 60) / 60) = X

(6,000 / 60) = X

100 = X

Therefore, her heart rate immediately after running was 100 beats per minute.

Answer:

X+9=2X

Step-by-step explanation:

the answer is X=9

Answer:

Non Proportional

Step-by-step explanation:

.99(2) = 1.96  1.96(2) = 3.92

That does go, therefore it's non proportional

Hope that makes sense !

Answer:

Its 15

Step-by-step explanation:

20% of 75 is just 15 lol. So i guess 15 Kilograms :)

(brainliest if this is correct for you)

Answer: A is the answer

Answer: a

Step-by-step explanation:

edge