Mathematics Middle School

A researcher posts a newspaper advertisement offering $10 in exchange for participation in a short study. The researcher accepts the first 10 people who respond to the advertisement. Which of the following statements is true about the sample?

a It is not a valid sample because it is only a short study.

b It is a valid sample because money is offered to participants.

c It is a valid sample because the first 10 people were selected to participate.

d It is not a valid sample because it is not a random sample of the population.

Answers

Answer 1

Answer:

A. it's not valid sample because it is only a short story...................................

Related Questions

Find the value of the variable(s) in each figure. Explain your reasoning

Answers

Answer:

x=14

y=37

Step-by-step explanation:

9x+12+3x=180

12x+12=180

-12 -12

12x=168

divide both sides by 12 and

x=14

then plug in 3(14)+4y-10=180

42+4y-10=180

32+4y=180

4y=148

y=37

X=15
Y=36.25

9x+12+3x=180
-12 -12
12x=180
divide by 12 both sides
X= 15

4y-10+3x=180
Substitute x for 15
4y-10+45=180
4y+35=180
-35 -35
4y=145
divide 4 both sides
Y=36.25

Can someone please help me?!

A middle school science teacher wants to conduct some experiments. There are 15 students in the class. The teacher selects the students randomly to work together in
groups of five.

a.
In how many ways can the teacher combine five of the students for the first
group if order is not important? (3 points)

b.
After the first group of five is selected, in how many ways can the teacher
combine five of the remaining students if order is not important? (3 points)

Answers

A is 3
B she can pick 2 by 2

The answer is A. She can pick in groups of 3

A scuba diver studying marine life is 4 feet below sea level. From that depth, the diver descends 72.5 feet to the ocean floor. He then rises to 6.25 feet. He rests there. Where is the diver relative to sea level when he is resting?

Create a number sentence and find the value where the diver is resting.

Answers

Answer :

“−66.25”

Explanation:

I did “ -72.5 + 6.25” I put a “-“ because the question says “below sea level” so that means that it’s a negative number. And the answer is “−66.25”

I need help on this question

Answers

Answer:

300+90+9

-45=0+40+5

Step-by-step explanation:

399-45=354

300 plus 90 for the top and 45 for the bottom

Simplify the following expression.

Answers

Answer:

Step-by-step explanation:

Evaluate the power:

Reduce:

Then simplify:

3h^4b^4/6h^5b

B^4/2hb

Simplify expression:

b^3/2h

I hope this helped, and I didn’t confused you. Good luck!

1b^3/2h^1 hope that helps

For every 100 teens surveyed, 8 said they worked at a grocery store last summer.

A True
B False

Answers

i’m gonna have. to go wit true. please mark me brainliest if i’m right

Answer: False, if the number has a percent symbol, it doesn't mean that that is the number of people that did the job. :)

Please answer Due in 10 min.

Answers

i think it is BBBBBBBB

I believe the answer is B

I need some help on this can u guys help?

Answers

1 and 3 are equations. Equations always have = sign

solve for q.
5 = 2(q + 10) - -5

Answers

Answer:

q = -10.

Step-by-step explanation:

5 = 2(q + 10) - -5

5 = 2q + 20 + 5

5 - 20 - 5 = 2q

-20 = 2q

q = -20/= -10.

Answer:

Step-by-step explanation:

5=2(q+10)-5

5=2q+20-5

5=2q+15

5-15=2q

2q=-10

q= -10/2

q= -5

5=2(q+10)--5

5=2q + 20 + 5

5= 2q + 25

5-25=2q

2q= -20

2q= -20/2

q= -10

May you please help me?

Answers

Answer:

.35 .49 .16

Step-by-step explanation:

13/37 18/37 6/37

.35.49.16 is the correct answer

Please help me with this question. Thank You.

Answers

Answer:

a) x+x+3

b) 40x+50×(x+3)

X+x+x+3

It is the ANWSER

please help now i need this quick

Answers

Answer:

7 is c because add up everything then make a fraction and 8 is C because 28÷2 is 14

7 is going to c and for 8 the answer is going to be 28/2 which ends up being 14

which letter does not have line symmetry

word: FEET

Answers

Answer:

The letter 'F'

mark me brainliestt :))

Answer is F
no matter where you draw a line in the middle it won’t look the same on either side whereas it would in the E and the T

5 1/4 divided by 2 3/8

Answers

Answer:

[tex]\frac{42}{19}[/tex] or [tex]2 \frac{4}{19}[/tex]

Step-by-step explanation:

5 1/4 divided by 2 3/8 basically means [tex]5 \frac{1}{4}[/tex] ÷ [tex]2\frac{3}{8}[/tex]. Reduce the expression by cancelling the common factors.

14 hope this helps. I’m sure I’m right

Aqua Town charges $6.00 admission plus $1.00 for each ride. The cost at Wet World is $3.00 admission plus $2.00 per ride.

a) Let x represent the number of rides. Write an equation for each park to show the relationship between the total cost (y) and the number of rides (x).

Aqua Town's equation:

Wet World's expression:

Answers

Answer:

Aqua Town's equation: $7.00

Wet World's expression: $5.00

Step-by-step explanation:

Aqua Town charges $6.00 admission plus $1.00 for each ride. = $6 + $1 = $7.00 (I add the zero in the number) The cost at Wet World is $3.00 admission plus $2.00 per ride. SLOVE = $3 + $2 = $5.00 (I add the zero back again) \

HOPEFULLY I AM RIGHT, HOPE THIS HELPS :)

:( HELP ME PLEASE ASAP

Answers

Answer:

the y-intercept is 1

the slope is 2/1

Step-by-step explanation:

Answer:

y=2x+1

Step-by-step explanation:

you go up one which is why you start at 1 on the y axis. then you go up 2 and right 1 which is 2/1 aka 2.

A coin will be flipped three times. The result of each flip is either heads (H) or tails (T). The outcome HTH represents the first result is heads, the second result is tails, and the third result is heads. The list of all possible outcomes is shown. Each outcome is equally likely.
HHH, HHT, HTH, HTT, THH, THT, TTH, TTT

a. 1/4
b. 1/3
c. 3/8
d. 1/2

Answers

Answer:

Step-by-step explanation:

♡ ∩_∩

（„• ֊ •„)♡

┏━∪∪━━━━┓

♡ good luck 。 ♡

┗━━━━━━━┛

the answer is D. 1/2

I WILL GIVE BRAINLIEST TO CORRECT ANSWER

Answers

Answer:

data set 2

Step-by-step explanation:

The diagram represents a right rectangular prism with dimensions labeled as algebraic expressions.
Which of these expressions represents the volume of the prism?

Select all that apply. *Choose 3*

Answers

Answer:

3rd Option

Step-by-step explanation:

Volume = (2x-5)*(2x+5)*3x

Volume = (4x^2 + 10x - 10x -25)*3x

Volume = 12x^3 +30x^2 -30x^2 - 75x

Volume = 12x^3 - 75x

The expressions represent the volume of the prism is

V = 12x^2 - 75x

The volume of a rectangular prism

The formula for calculating the volume of rectangular prism is expressed as:

V = lwh

l is the length

w is the width

h is the height

Given the following

l = 2x + 5

w = 2x - 5

h = 3x

V = 3x(2x+5)(2x-5)

V = 3x(4x^2 - 25)

V = 12x^2 - 75x

Hence the expressions represent the volume of the prism is

V = 12x^2 - 75x

Learn more on volume of prism here; https://brainly.com/question/23963432

What is the value of K ?

Answers

[tex] k + 60° = 180° [/tex] (linear pair)

⇒ [tex] k = 180° - 60° [/tex]

⇒ [tex] k = 120° [/tex].

Answer:

Step-by-step explanation:

k= 180-69

k= 120 degrees

anyone knows the answer ???

Answers

The answer is c because that’s the only on that calculate up to the problem

Answer:

Step-by-step explanation:

The answer is C because both of the equations have less than or equal to symbols. So, you would shade below both lines. The only place where the two lines mix shades is C.

You have been reflecting about your relationship with math. How can thinking about yourself as a learner help you become a better student?

Answers

It allows students to see the importance of their own learning process. Process Recognition: Students can identify what they did well, what they failed at, what they need to change.

start fresh in the new school year and go to extra help

Can someone please help me with this

Answers

Answer:

10) C

11) A

Step-by-step explanation:

Answer:

1. (3,5)

2. B

Not sure for the second one but try it

Write 2 expressions that is equivalent to double (3x+4y)

Answers

Answer: The answers are 2(3x+4y) and 6x+8y

Step-by-step explanation:

because 2 doubles it

Answer:

One is 6x+8y

And the second one is 12x+16y

Step-by-step explanation:

Can someone please help me with these two questions?

Answers

Answer:

D.9 1/3 and C.4

Step-by-step explanation:

options d for the first and c for the second

32. Convert the following description to a scale ratio in simplified form: 50 mm represents an actual distance of 2500 m

Answers

Answer:

scale = 1mm : 50m

GIVING Brainly TO CORRECT Answer
Raquel’s favorite basketball player scored 25, 17, 38, 11, and 24 points during her games. What is the mean number of points the player scored?

23

24

27

38

Answers

Answer:

Step-by-step explanation:

25 + 17 + 38 + 11 + 24 = 115 / 5 = 23

Answer:

Step-by-step explanation:

23 + 24 + 27 + 38 = 112

112 ÷ 4 (total numbers) = 28

Mean = 28

I have a test in 10 minutes and guesses on how i will do??

Answers

Answer:

I am sure you'll do great U-U

you have my blessings! ^^

hopefully u do great!!!! good luck

Any answers that are not whole numbers should be entered as a decimal rounded to the nearest tenth.

The kinetic energy of an object can be found using the following formula, where m is the mass of the object, v is the velocity, and K is the kinetic energy in units called joules.

A pushcart with a mass of 6 kilograms is moving at a velocity of 3 meters per second. The kinetic energy of the pushcart is ------

joules.

A wagon with a mass of 10 kilograms is moving at a velocity of 2 meters per second. The kinetic energy of the wagon is --------

joules.

Answers

I’m sorry but I don’t understand I need a picture

(Middle school math) please help, just for letter a. Thank you.

Answers

Answer:

She can wear the blue pair with all three shirts and jackets

She can wear the black pair with all three shirts and jackets

She can wear the brown pair with all three shirts and jackets

Sorry if it is wrong

She can wear the blue pair with all three shirts a and jackets

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