Indicate if the following would result in a random sample or a biased sample

Use a pattern, such as selecting every fourth person who enters the cafeteria

A. biased
B. random

Answers

Answer 1

Answer:

biased

Step-by-step explanation:

i took the test and I got it right


Related Questions

Miguel spent $11 to buy 16 apples and oranges. How many of each type of fruit did he buy F apples cost $0. 75 and oranges cost $0. 65

Answers

Answer:

Step-by-step explanation:

x + y = 16

.75x + .65y = 11

75x + 65y = 1100

-75x - 75y = -1200

-10y = -100

y= 10 organes

x + 10 = 16

x = 6 apples

x= 6 apples

y = 10 oranges

If the nth term of a number sequence is 4n^2+ n find the first 3 terms and 10th term

Answers

Answer:

1st term = 7, 2nd term = 18, 3rd term = 39, 10th term = 403

Step-by-step explanation:

To find the 1st term substitute 1 for n in the equation:

4(1)² + 1 = (4 × 1) + 3 = 4 + 3 = 7

To find the 2nd term substitute 2 for n in the equation:

4(2)² + 3 = (4 × 4) + 3 = 16 + 3 = 18

To find the 3rd term substitute 3 for n in the equation:

4(3)² + 3 = (4 × 9) + 3 = 36 + 3 = 39

To find the 10th term substitute 10 for n in the equation:

4(10)² + 10 = (4 × 100) + 3 = 400 + 3 = 403

Hope this helps!

solve for x and y.
A.
B.
C.
D.

Answers

Step-by-step explanation:

the height from the 90° angle (which is y here) in a right-angled triangle is the square root of the Sergent lengths of the Hypotenuse.

y = sqrt(3×9) = 3×sqrt(3)

and x we get via Pythagoras :

x² = y² + 9² = 27 + 81 = 108

x = sqrt(108) = sqrt(36×3) = 6×sqrt(3)

so, A is correct.

1 a) Complete the equivalent fractions for each of the fractions below.


a) 3/5 18/? ?/25 27/?



b) 4/7 8/? ?/49 44/?




b) Explain how to calculate an equivalent fraction.








2. Use the butterfly method to solve the following equations. Show your work.

Answers

Answer:

i think its letter B, maybe A?

The girl’s hockey team won 6 games, lost 3 games, and tied 2 games. What fraction of games did they win?

Answers

Answer:

6/11 games

Step-by-step explanation:

Take the total number of wins, losses, and ties, and add them up to get the total number of games.

3+2+6=11

Then divide the wins by the number of games to get the fraction.

6/11

Solve for the value of x.
10x-5
8x+9

Answers

Answer:

[tex]\displaystyle 7 = x[/tex]

Step-by-step explanation:

These are alternate interiour angles, and the theorem states that they are congruent, so set both expressions equivalent to each other:

[tex]\displaystyle 10x - 5 = 8x + 9 \Rightarrow \frac{-14}{-2} = \frac{-2x}{-2} \\ \\ \boxed{7 = x}[/tex]

I am joyous to assist you at any time.

I need help with this ASAP

Answers

Answer:

The answer is 6m²

hello bro

There is a bag with only red marbles and blue marbles.
The probability of randomly choosing a red marble is
7
8
.
There are 56 marbles in total in the bag and each is equally likely to be chosen.
Work out how many red marbles there must be.

Answers

Step-by-step explanation:

Multiply 56 by 7/8 to determine the amount of red marbles.

*56 can be put over 1.

Multiply;

[tex] \frac{56}{1} \times \frac{7}{8} = \frac{392}{8} [/tex]

Simplify by dividing by 8;

[tex] \frac{392 \div 8}{8 \div 8} = \frac{49}{1} [/tex]

There are 49 red marbles.

Determine if the two triangles are necessarily congruent. If so, fill in a flowchart proof
to prove that they are.
L
The triangles
necessarily congruent.

Answers

Answer:

Step-by-step explanation:

Who can help me with math?

Pls only comment on it without answering if u don’t how to do it.

Ty :)

Answers

Answer:

the answer is in the top

Step-by-step explanation:

hope it's helpful

the set of integers is closed numbers the operation division​

Answers

Answer:

The integers are closed under addition, multiplication and subtraction, but NOT under division

Step-by-step explanation:

9 ÷ 2 = 4½

What is the answer to 1/3 divided by 2 is in fractions

Answers

Answ1/6

Step-by-step explanation:

1/3 divided by 2

we can change the division sign into multiplication by flipping it and this will also inverse 2

so now we will have

1/3 x 1/2

=1/6

Which operation should you perform first in the expression 7 × 2 by the power of 3

Answers

Answer:

If the 7 x 2 is in parenthesis then you would do the 7 x 2 first then do 14 by the power of 3. If there is no parenthesis and the power of 3 is hovering next to the 2 then you would do 2 to the power of 3 and then multiply that by 7.

Step-by-step explanation:

PEMDAS. Whatever is in parenthesis gets solved first, then exponents and so on and so forth.

Does anyone know this? Please help! ASAP!!!

Answers

the answers:
a=4
b=5
c=6
d=1

Answer:

a=4

b=5

c=6

d=1

Step-by-step explanation:

4a=16

7+a+b=16

2b+c=16

a+b+c+d=16

An oil company fills 1 over 12 of a tank in 1 over 4 hour with gasoline. At this rate, which expression can be used to determine how long will it take for the tank to fill completely?

1 over 4 ⋅ 1 over 12 hours

1 over 12 ⋅ 4 hours

1 over 4 ⋅ 12 hours

12 ⋅ 4 hours

I am in middle school, not high school.

Answers

Answer:

1

Step-by-step explanation:

1/4 × 12 hours, since 12 × 1/12 = 1

Hope it helps!!!!!!!Brainliest pls!!!!!!

Solve the inequality.

r+0.2<−0.7

Answers

Answer:

r<−0.9

Step-by-step explanation:

Let's solve your inequality step-by-step.

r+0.2<−0.7

Step 1: Subtract 0.2 from both sides.

r+0.2−0.2<−0.7−0.2

r<−0.9

The circumference of a circle is 12.56 centimeters. What is the circle’s diameter?

Answers

Answer:

Step-by-step explanation:

Which situation has a sum of zero?

A. Borrowing $20 from my brother and paying him back $10.

B. Earning $5 for mowing the lawn and spending $5 on candy.

C. Earning $10 for mowing the lawn and spending $2 on candy.

D. Borrowing $10 from my mom and then another $5 from her the next day.

O B
O C
O A
O D

Answers

Answer:

The answer is B

Step-by-step explanation:

If you earn $5 when you mow the lawn, you now have $5 in your wallet. You then go and spend $5 on candy, which means you now have $0.

A. 20 - 10 = 10 (you will still money left)
B. 5 - 5 = 0
C. 10 - 2 = 8 (you will still money left)
D. 10 + 5 = 15 (you will still money left)


Therefore, our final answer is B



Hope this helps!

Solve by completing the square.
w2 – 16w – 19 = 0

Answers

Answer:

Factoring w2-16w+19

The first term is, w2 its coefficient is 1 .

The middle term is, -16w its coefficient is -16 .

The last term, "the constant", is +19

Step-1 : Multiply the coefficient of the first term by the constant 1 • 19 = 19

Step-2 : Find two factors of 19 whose sum equals the coefficient of the middle term, which is -16 .

-19 + -1 = -20

-1 + -19 = -20

1 + 19 = 20

19 + 1 = 20

Observation : No two such factors can be found !!

Conclusion : Trinomial can not be factored

w2 - 16w + 19 = 0

hope it helps

PLEASE HELP ASAP


I PUT A PHOTO ​

Answers

Answer:

7/8

Step-by-step explanation:

What is the radius of the circle x2+y2–81=0?

Answers

The Answer is 9
The radius is 9

Soo, I need help with these 3 math problems. I don't have enough time to do them before I go to bed.
So these apple pies have a ratio of 15 apples to 3 pies. How many apples do you need for 12 pies?

Answers

Answer:

60

Step-by-step explanation:

since 15 apples makes 3 pies you divided 15 by 3 and get 5. 5 apples for one pie so that would be 5 x 12 = 60

Answer:

Since with 15 apples we are able to make 3 pies, this means that in each pie there are 5 apples (15apples divided by 3 pies = 5 apples.)

If there are 12 pies we simply have to multiply 12x5 which equals 60, this means that if we needed to make 12 pies we would need 60 apples.

15apples:3pies   =   60apples:12pies

If an island's only residents are penguins and bears, and if there are 22 heads
and 52 feet on the island, how many penguins and how many bears are on the
island?

Answers

Answer:

27 penguins and 43 bears

i hope thats right lol

Step-by-step explanation:

Type SSS, SAS, ASA, SAA, or HL to
justify why the two larger triangles are congruent.

Answers

Answer: ASA

Step-by-step explanation:

In addition to the given information, angle C is congruent to itself by the reflexive property, making ASA congruence.

What is the area of this triangle?
6 cm
11 cm

Answers

Answer: 33

Step-by-step explanation:

Answer:

33

Step-by-step explanation:

Area of a triangle = [tex]\frac{bh}{2} \\[/tex] (base × height ÷ 2)

A = 6 · 11
       2

A = 66
      2

A = 33

16 of 18
!!!
Write a numerical expression to represent the phrase "the sum of 25 and the cube of 9." Do not evaluate the expression.
st answer in the box

Answers

25+9^3
there is no need to solve for this value since it says to not evaluate

Find the solution of the system of equations. 3x-8y = 19
3x + 5y = -46

Answers

(-7,-5)

Step-by-step explanation:

3x-8y = 19

minus

3x + 5y = -46

0x - 13y = 65

- 13y = 65

÷-13

y = - 5

Substitute y = - 5 into one of the functions:

3x-8y = 19

-8 x - 5 = 40

3x + 40 =19

-40

3x. = - 21

÷3

x= - 7

Solution is (-7,-5)

Hope this helps!

A 28 ft ladder leans against a wall so that the base of the ladder is 7 ft away from the base of the wall. How far up the wall does the ladder reach.

Round your answer to the nearest tenth.

Answers

the top of the ladder is 27.5ft above the
ground.
^ 3.0
Step-by-step explanation:
The ladder makes an angle, 0 with the
ground thus forming a right angle triangle
with the wall of the house.
The length of the ladder represents the
hypotenuse of the right angle triangle.
The ground distance from the base of the
wall to the foot of the ladder represents the
adjacent side of the right angle triangle.
Therefore, to determine how high up is the
top of the ladder on the wall, ×, we would
apply Pythagoras theorem which is
expressed as
Hypotenuse?
2= opposite side? + adjacent
side?
282=×2+52
784 =×2 + 25
x2 = 784 - 25 = 759

answer the top 3 please i don’t need the rest

Answers

Answer:

a) inscribed angle LNP

b) minor arc: LP

c) semicircle: LN

Find the value of X for the given parallelogram

Answers

Opposite angles in a parallelogram are congruent

So,


6x-10 = 2x + 50

Now solve like a normal equation

4x = 60
x = 15

Answer:

15

[tex] \: [/tex]

Step-by-step explanation:

Parallelogram is a quadrilateral whose both pairs of opposite sides are parallel and equal and opposite angles are also equal.

[tex] \: [/tex]

So,

[tex] \\ { \longrightarrow \qquad{ \pmb{ \sf { \angle P = \angle R}}}} \: \: \\ \\[/tex]

[tex]{ \longrightarrow \qquad{ \pmb{ \sf { 6x - 10 = 2x + 50}}}} \: \: \\ \\[/tex]

Subtracting 2x from both sides we get :

[tex] \\ { \longrightarrow \qquad{ \pmb{ \sf { 6x - 10 - 2x = 2x + 50 - 2x}}}} \: \: \\ \\[/tex]

[tex]{ \longrightarrow \qquad{ \pmb{ \sf { 4x - 10 = 50 }}}} \: \: \\ \\[/tex]

Adding 10 to both sides we get :

[tex] \\ { \longrightarrow \qquad{ \pmb{ \sf { 4x - 10 + 10 = 50 + 10 }}}} \: \: \\ \\[/tex]

[tex]{ \longrightarrow \qquad{ \pmb{ \sf { 4x = 60 }}}} \: \: \\ \\[/tex]

Dividing 4 from both sides we get :

[tex]{ \longrightarrow \qquad{ \pmb{ \sf { \frac{4x}{4} = \frac{60}{4} }}}} \: \: \\ \\[/tex]

[tex]{ \longrightarrow \qquad{ \pmb{ \frak { x = 15 }}}} \: \: \\ \\[/tex]

Therefore,

The value of x is 15

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