Which of the following principles of experimental design reduces errors due
to chance by repeating an experiment on different subjects under different
conditions?
A. Placebo effect
B. Replication
C. Randomization
D. Control
E. Blindness

Answers

Answer 1

Answer:

Replication

Step-by-step explanation:

Replication meaning it's going to be repeated, also it said replication was right on a-pex


Related Questions

Is 2x^2+5x^2-8 a monomial, binomial or trinomial?

Answers

Answer:

trinomial

Step-by-step explanation:

plus and minus signs separate terms.

2x^2 is a term

5x^2 is another term

-8 is another term.

The given algebraic expression is binomial.

The given expression is 2x²+5x²-8 (7x²-8).

We need to check whether the given expression is a monomial, binomial or trinomial.

What are the different types of algebraic expression?

The different types of algebraic expression are explained below:

Monomial: An algebraic expression which consists of one non-zero term only is called a monomial.

Binomial: An algebraic expression which consists of two non-zero terms is called a binomial.

Trinomial: An algebraic expression of three non-zero terms only is called a trinomial.

Now, the given expression 7x²-8 as two terms.

Therefore, the given algebraic expression is binomial.

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David correctly factored the expression m^2 - ono
12m - 64.
Which expression did he write?
(1) (m-8)(m - 8) (3) (m - 16)(m + 4)
(2) (m - 8)(m + 8) (4) (m +16)(m - 4)
Explain why

Answers

Answer:

the correct option is number (3). It corresponds with the expression David factorised.

Step-by-step explanation:

David correctly factored the expression m² - 12m + 64, we want to check which one of the options he wrote.

(1) (m - 8)(m - 8) = (m - 8)²

= m² - 16m + 64

NOT THIS

(2) (m - 8)(m + 8) = m² - 8²

= m² - 64

NOT THIS

(3) (m - 16)(m + 4) = m² + 4m - 16m - 64

= m² - 12m - 64

THIS IS THE CORRECT OPTION AS IT CORRESPONDS WITH THE EXPRESSION DAVID FACTORISED

(4) (m + 16)(m - 4) = m² - 4m + 16m - 64

= m² + 12m - 64

NOT THIS

Factor x^3 - 4x^2 + 7x - 28 by grouping. What is the resulting expression

Answers

Answer:

Step-by-step explanation:

x³ - 4x² + 7x - 28 = x³ - 4x² + 7x - 7*4

                    = x²(x - 4) + 7(x - 4)

                    = (x - 4 )(x² + 7)

farmer brown has 24 crates of apples. he gives all of the apples to the teachers at his daughter's school. each teacher receives 3/4 of a crate of apples. work out how many teachers are at his daughter's school.

Answers

Answer:

32

Step-by-step explanation:

24/0.75=

32

Eight cards are marked 3, 4, 5, 6, 7, 8, 9, and 10 such that each card has exactly one of these numbers. A card is picked without looking. Find the probability. Write the answer as a fraction.



P(greater than 5)



A.
5
9
5
9

C.
5
8
5
8

B.
3
8
3
8

Answers

Answer:

5/8.

Step-by-step explanation:

Prob( Card is > 5) = number of cards > 5 / total number of cards

= 5/8

what is the answer to z+10=5 ?

Answers

Answer:

z = -5

Step-by-step explanation:

z + 10 = 5

z = 5 - 10

z = -5

Answer: hope this helps ♡

z = -5

Step-by-step explanation:

z + 10 = 5

z + 10 - 10 = 5 - 10

z = -5

(double-check: -5 + 10 = 5 ✓)

Make the calculations mentally.

Type the answers in the boxes below.

1. 99+54 =

2. 244−99 =

3. 99 • 6 =

4. 99 • 15 =

Answers

Answer:

1. 99+54 = 153

2. 244−99 = 145

3. 99 • 6 = 594

4. 99 • 15 = 1485

1. 153
2. 145
3. 594
4. 1485

Log(2) 256 = 8, write the exponential form​

Answers

Answer:

28=256

Convert the exponential equation to a logarithmic equation using the logarithm base (2)

of the right side (256) equals the exponent (8)

.

log2(256)=8

Step-by-step explanation:

In exponential form, the base (2 in this case) is raised to the exponent (8), resulting in the value on the right side of the equation (256).

In the given equation, we have:

Log₂ 256 = 8

This equation can be read as "the logarithm base 2 of 256 equals 8."

To express it in exponential form, we need to understand that logarithms and exponentiation are inverse operations.

In other words, if we have a logarithmic equation like this, we can convert it into an exponential equation by applying the exponentiation operation.

In this case, the logarithm is base 2, so the exponential form will have a base of 2 as well.

The exponent will be the value equal to the logarithm result. Thus, we can write the exponential form as:

2⁸ = 256

In this equation, 2 is the base and 8 is the exponent.

By raising 2 to the power of 8, we get the value of 256, which is equivalent to the logarithmic expression Log₂ 256 = 8.

Hence in exponential form, the base (2 in this case) is raised to the exponent (8), resulting in the value on the right side of the equation (256).

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6,291 DIVIDED BY 3 = ?
its easy i know lets see if your smart.

Answers

Answer:

6,291÷3=2,097

Hope this helped :)

the answer is 2,097

Step-by-step explanation:

6,291 divided bt 3= 2,097

the total amount of fiber (in grams) in a package containing x apples and y oranges is given by the equation 5x + 10y = 110. is it possible for the package to contain 15 apples? EXPLAIN

Answers

Answer:

Step-by-step explanation:

The y intercept is the value of y when x = 0. Similarly, the x intercept is the value of x when y = 0. To find each of these, we separate the equation as shown in the attached image. After solving for x and y, we find that the y intercept is 11 and the x intercept is 22. For part e, we substitute 15 in for x. So instead of putting x in the equation, we will put 15 and solve for y. After solving, we see that y will equal 3.5. However, since we cannot have a "half apple" in the package, we see that it is not possible to have 15 apples in the package.

A recipe calls for 1/6 teaspoon of vanilla extract. If the recipe is doubled, then how much vanilla extract is needed?

Answers

Answer:

1/3

Step-by-step explanation:

1/6 Doubled is 2/6

Simplified

1/3

Which of these graphs represents a function


A.w
B.x
C.y
D.z

Answers

the graph the represent a function is D.z because it shows an actual function

The correct option is D. The graph z is representing a quadratic function.

What is a quadratic function?

In algebra, a polynomial function with one or more variables in which the highest-degree term is of the second degree is known as a quadratic function, a quadratic polynomial, a polynomial of degree 2, or simply a quadratic.

The general form of the quadratic functions is represented as below:-

y = ax² + bx + c

Where a,b, and c are the constants x and y are variables.

The graph of the quadratic functions will be parabolic on the x-y plane.

Therefore, the correct option is D. The graph z is representing a quadratic function.

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B. Lance is 39 years old. Ted is 22 years old.
Rosalinda is 45 years old. How old is Erik if the
mean age of the four friends is 33.5?​

Answers

Answer:

28 years

Step-by-step explanation:

Sum of the years of Lance , Ted, Rosalinda = 39 + 22 +45 = 106 year

Sum of the years of Lance , Ted, Rosalinda & Erik = 33.5*4 = 134.0 year

Age of Erik = 134 - 106 = 28 years

1 foot = 12 inches. 1 inch = 2.5 centimetres. Change 5 feet 10 inches to centimetres​

Answers

I guess the answer should be 177.8 cm.

The measurement of 5 feet 10 inches to centimeters​ is 175 centimeters.

What is Unit of Measurement?

Units of measurement are defines ad the definite magnitude of a physical quantity. It is used to find a number that shows the amount of something.

Here we have to convert the units of measurement feet and inches to centimeters.

We have,

1 foot = 12 inches and 1 inch = 2.5 centimeters

We have to change 5 feet 10 inches to centimeters​.

1 foot = 12 inches

⇒ 5 feet = 12 × 5 inches

              = 60 inches

So, 5 feet 10 inches = 60 inches + 10 inches

                                 = 70 inches

1 inch = 2.5 centimeters

70 inches = 70 × 2.5 centimeters

                 = 175 centimeters

Hence we got 5 feet 10 inches as 175 centimeters.

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Solve: Negative one-half + c = StartFraction 31 over 4 EndFraction

c = StartFraction 33 over 4 EndFraction

c = 8

c = StartFraction 29 over 4 EndFraction

c = 7

Answers

Answer:

A

Step-by-step explanation:

i am a bakon trust me

plz brainliest for bakon :D i know u want B)

Answer:

A

Step-by-step explanation:

got it right on edge so......

WILL MARK BRAINLIEST! A bag has 4 blue marbles, 6 green marble and 3 red marbles in it. What is the ratio proportion of pulling a red or green marble from the bag ? *

Answers

Answer:

9:13

Step-by-step explanation:

Someone plz help what would this be

Answers

Answer:

5

Step-by-step explanation:

(125) ^ (1/3)

What number times itself times itself =125

a*a*a =125

5*5*5 = 125

If Mitchell buys 3/10 of a pound of cream cheese and 3/10 of a pound of sour cream, how much will he spend?

plain yogurt $5 per pound​
sour cream $5 per pound​
Greek yogurt $3 per pound​
cream cheese $3 per pound​

Answers

Answer:

$2.40

Step-by-step explanation:

Take the price of each item and divide by ten to find the cost of 1/10:

3 divided by 10 = .3

5 divided by 10 = .5

Then multiply by the amount he is purchasing:

.3 x 3 = .9

.5 x 3 = 1.5

Add the prices together for a total:

.9 + 1.5 = 2.4

HELP ASAP WILL MARK BRAINLIEST
IF YOU DONT KNOW DONT ANSWER

Answers

Answer:

x = 13

48 = 5x - 17

+17        + 17

5x = 65

x = 13

I have no clue! Please help!

Answers

The answer would be 4m. By following the equation x^2+3^2=5^2, you would simplify and have x^2+9=25. Subtract 9 from 25 and you’ll get 16. After finding the square root you will get 4.

can someone explain the Pythagorean Theorem to me​

Answers

Answer:

The Pythagorean theorem deals with the lengths of the sides of a right triangle. ... The sum of the squares of the lengths of the legs of a right triangle ('a' and 'b' in the triangle shown below) is equal to the square of the length of the hypotenuse ('c').

Step-by-step explanation:

you choose at random from the letters a,b,c and d and you roll a number cube once. what are the chances that you get an a and 5?

Answers

1/24 or 4%

There is a total of 24 outcomes
4 letters • 6 numbers = 24 possible outcomes
There are 6 different outcomes when it comes to each letter.
(a1, a2, b1, b2 etc)
so getting a5 is a 1/24 chance because there 24 outcomes and only one of them is a5

Answer:

[tex]\frac{1}{24}[/tex]

Step-by-step explanation:

The area of a wetland is 10,000 acres. A biologist predicts that the area of the wetland will change according to the equation y equals 10000 left-parenthesis 0.65 right-parenthesis Superscript x Baseline, where y is the area of the wetland after x years. Based on the biologist's prediction, what will the area of the wetland be in 2 years?

Answers

Answer:

4,225 acres

Step-by-step explanation:

If a biologist predicts that the area of the wetland will change according to the equation [tex]y = 10,000(0.65)^{x}[/tex] where;

y is the area of the wetland after x years

In order to determine the area of the wetland in 2 years based on the biologist prediction, we will substitute the value of x = 2 into the modeled equation as shown;

[tex]y = 10,000(0.65)^{2}\\y = 10,000 * 0.4225\\y = 4225[/tex]

The area of the wetland in 2 years based on the biologist prediction will be 4225 acres

Answer:

4225

Step-by-step explanation:

3|2−x|=−6
can someone answer this question for me?? THNX!!!

Answers

I tried it and got no solution :/

Answer: the answer is 4

Step-by-step explanation:

3(2−x)=−6

Step 1: Simplify both sides of the equation.

3(2−x)=−6

(3)(2)+(3)(−x)=−6(Distribute)

6+−3x=−6

−3x+6=−6

Step 2: Subtract 6 from both sides.

−3x+6−6=−6−6

−3x=−12

Step 3: Divide both sides by -3.

−3x

−3

=

−12

−3

x=4

Answer:

x=4


Find the point on the terminal side of θ = negative three pi divided by four that has an x coordinate of -1. Show your work for full credit.

Answers

Answer:

(-1,-1)

Step-by-step explanation:

x = rcos(theta)

-1 = r cos(-3pi/4)

-1 = r(-sqrt(2)/2)

r = sqrt(2)

y = rsin(theta)

y = sqrt(2)sin(-3pi/4)

y = -1

(-1,-1)

A $135.00 item is marked down by 30%.
What is the new cost of the item?
Round to two decimals if needed.



Answers

Answer:

135.00 multiplied by .30% will be 40.5

Answer:

You can also calculate how much you save by simply moving the period in 30.00 percent two spaces to the left, and then multiply the result by $135 as follows: $135 x . 30 = $40.50 savings. Furthermore, you can get the final price by simply deducting .

Step-by-step explanation:

-4b - 5 + 2b =10. Can I have some help solving this.

Answers

Answer:

-7.5

Step-by-step explanation:

Simplify

-4b - 5 + 2b = 10

-2b - 5 = 10

-2b = 15

b = -7.5

Answer:

-7.5

Step-by-step explanation:

-4*- 7.5 =30

2*-7.5=   -15

30-5-15=10

Which number line plots the integers –2, 3, and 4?
A. A number line going from negative 5 to positive 5. Points are at negative 3, negative 2, and 4.
B. A number line going from negative 5 to positive 5. Points are at negative 4, negative 3, and 2.
C. A number line going from negative 5 to positive 5. Point are at 2, 3, 4.
D. A number line going from negative 5 to positive 5. Points are at negative 2, 3, 4.

Answers

Answer: A

Step-by-step explanation: Point A plots all the points needed.

Answer:

Numbro 1

Step-by-step explanation:

I took the test on edgn

Simplify: 327
A)
3
B)
4
0)
7
D)
8

Answers

You can’t simplify it because it’s a already a whole number.

how do you solve for rate in D=r(t)

Answers

Answer:

Its C

Step-by-step explanation:

I already did the test, and got it right.

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