Is this a fair or biased sample.

A store owner wants to survey customers about the products he sells. He programs the computer to select 100 customers from the mailing list and sends them each a survey.

(I'm torn on this one because on one hand, he's only selecting customers from his mailing list which makes me think biased, on the other he is using the computer to randomly select them so that seems fair. Also, of the people who are sent the surveys, everyone may not apply. So I'm leaning towards biased.)

Answer:

2.865

Step-by-step explanation:

pls rate five stars, thanks  :)

Answer:

x=40

Step-by-step explanation:

multiply both sides by 4/3

use gcf (4) to reduce #s

multiply

Answer: It is exactly 85.7142857143

But if you would like it rounded: 85.7

I would go with the second answer.

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The solution of the expression is,

⇒ 85.72

Division method is used to distributing a group of things into equal parts. Division is just opposite of multiplications. For example, dividing 20 by 2 means splitting 20 into 2 equal groups of 10.

Given that;

The expression is,

⇒ 600 divided by 7

Now, We can divide the numbers as;

⇒ 600 divided by 7

⇒ 600 ÷ 7

⇒ 85.72

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Answer:

0

Step-by-step explanation:

there is no way to convert it to a whole number so it would be 0

Answer:

b= -4

Step-by-step explanation:

On both sides of the equation has distributive property. We need to solve that first. Let's start with the left side of the equation.

*Positive multiplied by a negative equals a negative

-2b+2(b-10)= 2(10+5b)

-2b+2b-20= 2(10+5b)

-20= 2(10+5b)

Now let's solve the right side of the equation

-20= 20+10b

-20  -20

-40 = 10b

-40/10 = 10b/10

b= -4

Hope this helps!

Answer:

The equation of the perpendicular line:

2x + 5y = ╼ 15

Answer:

0.4 %

Step-by-step explanation:

Given:

Percent of pages that do not have pictures = (number of pages without pictures ÷ total number of pages) × 100%

= 1/250 × 100%

= 0.004 × 100%

= 0.4 %

Answer:

0.4%

explanation:

solve:

[tex]\sf \dfrac{1}{250} * 100[/tex]

0.4%

Answer:

$149x10+$143+3-9

Step-by-step explanation:

Answer: Area of the rectangular room = length x Breadth

Length= 18 and Breadth = 12

Therefore the Area required to cover the floor = 18 * 12 = 216 ft2

The area of the rectangular room is given by the equation A = 216 feet²

The area of the rectangle is given by the product of the length of the rectangle and the width of the rectangle

Area of Rectangle = Length x Width

Given data ,

Let the area of the rectangle be represented as A

Now , the equation will be

The length of the rectangular room = 18 feet

The width of the rectangular room = 12 feet

Area of Rectangle = Length x Width

Substituting the values in the equation , we get

Area of the rectangular room = 18 feet x 12 feet

On simplifying the equation , we get

Area of the rectangular room A = 216 feet²

Therefore , the value of A is 216 feet²

Hence , the area of the rectangular room is 216 feet²

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Answer:

5 × 2= 10

5 × 4=20

5 × 5=25

5 × 10=50

5+5+5+5=20

there your answer

Step-by-step explanation:

you slow -_-

Answer : 5 x 4 (Option C)

Step-by-step explanation :  5 + 5 + 5 + 5 = 20

                                            By trial & error method, we get

                    5 x 2 = 10 ≠ 20

                    5 x 4 = 20

                    5 x 5 = 25 ≠ 20

                    5 x 10 = 50 ≠ 20

Hence 5 x 4 is the right answer

You can either follow the trial & error method or the following method !!

5 + 5 + 5 + 5 has ' 4 ' fives

Hence, 5 + 5 + 5 + 5 = 5 (since it is the no) x 4 (since it is the no of times 5 is repeating)

Hence 5 x 4 is the right answer

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Answer:

[tex]\frac{3x+7}{x+2}[/tex]

Step-by-step explanation:

Given the following question:

[tex]\frac{(x+4)(3x+7)}{(x+4)(x+2) }[/tex]

In order to simplify the expression given we can only cancel the common factor which is four.

[tex]\frac{(x+4)(3x+7)}{(x+4)(x+2) }[/tex]
[tex]cf=(x+4)[/tex]
[tex]\frac{x+4}{x+4}[/tex]
[tex]=\frac{3x+7}{x+2}[/tex]

Cannot be simplified further due to it not having any more common factors. Your answer is "3x + 7 / x + 2."

Hope this helps.

Answer:

( 3x+7 ) / ( x+2 )

Step-by-step explanation:

\frac{(x+4)(3x+7)}{(x+4)(x+2)}

When you set up the equation like a fraction, you can now cancel out like terms. (x+4) is in the denominator- as well as the numerator. They are the same in parentheses. So you can cancel. Once that's done, you'll be left with

\frac{3x+7}{x+2}

You cant simplify any further because there are no more (like groups) aka (common factors)

( 3x+7 ) / ( x+2 )

Answer:

k = 29

Step-by-step explanation:

5k - 3 + 9 + k = 180

6k + 6 = 180

6k = 180 - 6 = 174

k = 174/6 = 29

Answer:

1,-4.5

Step-by-step explanation:

Answer:

(-2,-9) is the answer

3x - 2y = 12

3(-2) - 2(-9) = 12

-6+18 = 12

12 = 12

Answer:

c

Step-by-step explanation:

18 percent of 120 is 21.6

Answer:

75% chance

Step-by-step explanation:

Probability always adds to 1.00

Letter grades are always in the form A, B, C, D...

The grades above a C are A, which is a 25% chance and B, which has a 50% chance. Adding these up we get a 75% chance.

#LearnWithBrainly

The probability of getting a grade above a C is 0.75, or 75%.

We have,

To calculate the probability of getting a grade above a C, you need to add the probabilities of getting an A or a B.

Given:

Probability of getting an A (P(A)) = 0.25

Probability of getting a B (P(B)) = 0.50

A grade above a C includes grades of A and B.

Therefore, the probability of getting a grade above a C (P(above C)) is:

P(above C) = P(A) + P(B)

P(above C) = 0.25 + 0.50

P(above C) = 0.75

Thus,

The probability of getting a grade above a C is 0.75, or 75%.

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Answer:

the nearest tenth of the cm is 6.9 cm

Answer:

Step-by-step explanation:

(a) u³, 3x² + 2

(b) 3(3x² + 2)² * 6x = 18x * (3x² + 2)²

Answer:

The derivative (or gradient function) describes the gradient of a curve at any point on the curve. Similarly, it also describes the gradient of a tangent to a curve at any point on the curve.

To determine the equation of a tangent to a curve:

Find the derivative using the rules of differentiation.

Substitute the \(x\)-coordinate of the given point into the derivative to calculate the gradient of the tangent.

Substitute the gradient of the tangent and the coordinates of the given point into an appropriate form of the straight line equation.

Make \(y\) the subject of the formula.

The normal to a curve is the line perpendicular to the tangent to the curve at a given point

Step-by-step explanation:

Answer:

7

Step-by-step explanation:

7 is the median because it has 3 numbers to each side so it is the median :)

Have a wonderful day!!

Please rate and mark brainliest!!

Answer:

7.57 rounded to the nearest hundredths

Step-by-step explanation:

1+3+4+7+11+12+15=53

53/7= 7.57 rounding to the nearest hundredths

You first add up all the numbers and that answer divided by the number if numbers

Answer:

14.8

Step-by-step explanation:

Well, it says that Mike ran 1 second slower. Which means that it took more time for Mike to finish. So, you add 1 second to 13.8 seconds and the answer is 14.8.

Answer: 3rd one

Step-by-step explanation:

Answer:

C. Add 200 and 2

Step-by-step explanation:

Step-by-step explanation:

I wrote it down with steps

I hope you benefit from me

Answer:

20 5/8

Step-by-step explanation:

Answer:

3x+10

Step-by-step explanation:

Since the perimeter of a square is 4 times the side length, to find the side length given the perimeter, just divide by 4:

(12x+40)/4 = 3x+10

Therefore, the answer is 3x+10

Answer:

$500625

Step-by-step explanation:

$27 per yard. Grass seed costs $2 per square foot. How much does it cost to fence and seed the pasture?  A land for farming has a square-shaped piece of land and an isosceles triangular shaped piece of land that share a base. The square piece of land has a side length of 450 feet. The triangle has legs of 255 feet and height of 120 feet.     area shape square = 450 *450 Square Area = 202500 SQft  perimeter = 450* 4 =1800 Ft  TRIANGLE = Hypotenuse is given by formula H=B√2 but height is already given = 120 and 255 area = Height  * Base = 120 * 255 =Triangle Area = 30600 feet squared     perimeter = 255 * 3 = 765 Ft   fence perimeter is 765-255 = 510 feet   total area = 202500+ 30600= 233100 square foot = 233100* $2 = (*2) = $466200  total fence = 765+510 = 1275 feet = 1275(*$27) = $34425   Total cost =   466200+34425 = $500625

Answer:

$120

Step-by-step explanation:

20*6=120

Answer:

$120

Step-by-step explanation:

If lessons cost $20 per week, multiply the cost ($20) by the amount of weeks (6);

20*6= 120

Answer:

x-10 [tex]\geq[/tex] 91

Step-by-step explanation:

Difference means subtraction, and "a number" since not specified is x, and at least means greater than or equal to and not less than. So the difference (subtract) of a number (x) and 10 is at least (greater than or equal to) 91 :D

Answer:

Um... your question is imcomplete

Step-by-step explanation:

answer:

A' (-3,3) B' (-2,-1) C' (-6, -2)

Answer:

∠C is 70°

Step-by-step explanation:

50+60=110
110+70 = 180 degree angle of a triangle