Rodell wants to find the favorite gaming app among the students at his school. He decides to poll the thirty students on his football team and the fifteen students on his basketball team to gather the data. What is wrong with Rodell’s method for collecting his data?
Rodell only polled fellow athletes; this sample does not represent nonathletes at the school.
Rodell needs a larger sample size than two sports teams to represent a whole school.
Rodell polled everyone on his teams; he should have only polled every other student for it to be a true sample.
Rodell’s polling method only included fall and winter sports; he should have also included a spring sport like baseball.

Answer:

Step-by-step explanation:

Use formula:

1)

Correct choice is B

2)

Correct choice is A

Answer:

31.4

Step-by-step explanation:

taking π = 3.14

circumference = 3.14 × 10

Answer:

Step-by-step explanation:

This is an arithmetic sequence because each term subtracted by the previous term is a constant called the common difference.

an=a+d(n-1) where a is the initial term and d is the common difference

a=-20 and d=-16+20=4 so

an=-20+4(n-1)

an=4n-24

The sum of an arithmetic sequence is the average of the first and last terms times the number of terms

sn=(a1+an)(n/2)

s30=(-20+4(30)-24)(30/2)

s30=1140

The sum of the first 30 terms of the sequence –20, –16, –12, –8, –4, . . . is obtained being 1140

Arithmetic sequence is a sequence where each consequtive term has a common constant difference.

An arithmetic sequence, therefore, is defined by two parameters, viz. the starting term and the common difference.

Let the starting term be 'a' and common difference be 'd', then we get the arithmetic sequence as:

[tex]\rm a, a+d, a+2d, \cdots[/tex]

The sum of the first 'n' terms of that sequence is is:

[tex]\rm a + (a+d) + (a+2d) + \cdots + (a+(n-1)d) = \dfrac{n}{2}[2a + (n-1)d ][/tex]

For this case, the series –20, –16, –12, –8, –4, . . . starts from a = -20,

and each next term is obtained by adding d = 4 in previous term.

Thus, the sum of the first n = 30 terms of that sequence is evaluated as:
[tex]S_n = \dfrac{n}{2}[2a + (n-1)d ]\\\\S_{30} = \dfrac{30}{2}[2(-20) + (30-1)(4) ] = 15(-40 +116) = 15 \times 76 = 1140[/tex]

Thus, the sum of the first 30 terms of the sequence –20, –16, –12, –8, –4, . . . is obtained being 1140

Learn more about arithmetic sequence here:

https://brainly.com/question/3702506

#SPJ2

Answer:

Step-by-step explanation:

a 30-60-90 right triangle is a right triangle because of the 90

the 30 and the 60 have to make 90 too since traingles make 180

30 + 60 + 90 = 180

so 30-60-90 is a right triangle.

Right triangles also can use pythagoran theorem, so the angle ratio is

30-60-90

but the side ratio is

a² + b² = c²

Answer:

It already is rounded to the nearest percent, 60.

Step-by-step explanation:

Answer:

At least 26 questions to get around an 82% not 25 because that equals 78%

Step-by-step explanation:

Answer:

Kevin answered 24 questions correctly.

Kevin would have to answer 25.6 questions correctly to get more than 80%.

Answer:

19/1

Step-by-step explanation:

Hi,

Any whole number written as a fraction is simply that number over one :)

If you were to write 80 as a fraction, it would be 80/1.

And so on...

I hope this helps <3

Answer: m ≥ 13

m + 7 ≥ 20

Step-by-step explanation:

you basically subract 7 from 20 and 7

7-7 will cancel each other out 20-7 will give you = 13

m ≥ 13 is your answer

Answer:

b

Step-by-step explanation:

Answer:

Circumference: 69.11 m

Area: 380.13 m

Cos Milky said it. Trust Milky. Milky Smart.

Answer:

the sum of all even number from 0 to 420 is 175980

Answer:

i think x=4

Step-by-step explanation:

Answer:

yeah it's x = 4

Step-by-step explanation:

Answer:

4

Step-by-step explanation:

2+3+6+5 is 16 and since there are 4 numbers 16/4 is 4

Answer:

4

Step-by-step explanation:

To find average you must add up all of the numbers and then divide by the amount of numbers there are

2+3+6+5= 16

there are 4 numbers, so you do 16/4

16/4 = 4

Hope this helps!!

-Ketifa

Answer:

$600

Step-by-step explanation:

[tex]20\% \: of \: 750 \: is = [/tex]

[tex] \frac{20}{100} \times 750[/tex]

[tex] = 150[/tex]

Subtract 150 from 750 to get discount price

[tex]750 - 150 \\ = 600[/tex]

Therefore, the discount price is $600

Answer:

Step-by-step explanation:

Rate of change = the difference in y/the difference in x.

20 - 6.50/4 - 1 = 13.5/3 = 4.5/1

24.5 - 20/5 - 4 = 4.5/1

33.5 - 24.5/7 - 5 = 9/2 = 4.5/1

The rate of change is 4.5.

Answer:

[tex]x_{1} =[/tex] [tex]\frac{5 + \sqrt{10} }{3}[/tex]  and [tex]x_{2} =[/tex] [tex]\frac{5 - \sqrt{10} }{3}[/tex]

Step-by-step explanation:

3x^2-10x+5=0

[tex]x_{1}[/tex] = [tex]\frac{10 + \sqrt{10^{2}-4*3*5 } }{2*3}[/tex]                  [tex]x_{2} =[/tex] [tex]\frac{10 - \sqrt{10^{2}-4*3*5 } }{2*3}[/tex]

[tex]x_{1} =[/tex] [tex]\frac{10 + \sqrt{100-60} }{6}[/tex]                      [tex]x_{2} =[/tex] [tex]\frac{10 - \sqrt{100-60} }{6}[/tex]

[tex]x_{1} =[/tex] [tex]\frac{10 + \sqrt{40} }{6}[/tex]                            [tex]x_{2} =[/tex] [tex]\frac{10 - \sqrt{40} }{6}[/tex]

[tex]x_{1} =[/tex] [tex]\frac{10 + 2\sqrt{10} }{6}[/tex]  / 2                    [tex]x_{2} =[/tex] [tex]\frac{10 - 2\sqrt{10} }{6}[/tex]  / 2

[tex]x_{1} =[/tex] [tex]\frac{5 + \sqrt{10} }{3}[/tex]                             [tex]x_{2} =[/tex] [tex]\frac{5 - \sqrt{10} }{3}[/tex]

Answer:

b

Step-by-step explanation:

The respiratory system basically help us breathe.

Answer:

- 60° (or - π/3)  or 240° and 300°

Step-by-step explanation:

sin⁻¹ ((-√3) /2) : in third quadrant and 4th quadrant will produce negative sine value

sin⁻¹ ((-√3) /2) = - 60° (or - π/3)  or 240° and 300°

Answer and Explanation:

If, on the other hand, the graph "flexes" or "flattens out" to some degree when it goes to cross the axis, then the zero is of a higher multiplicity; that is, it'll be of multiplicity three, five, or higher.

When a graph doesn't start at 0, it means that the graphs before it is not shown.

For number 4, I'd suggest Graph 3.

For number 3, I'd suggest graph 1.

For number 5, Write something along the lines of "Graph 2 does not show the car stopping slowly, it stops suddenly. Then it starts going really fast and stops suddenly again."

I hoped this helped.

Answer:

ŷ = -0.07637X + 61.36874

Step-by-step explanation:

Score, x :

545

595

640

675

705

750

Interest %, y:

18.982

17.967

12.218

8.612

6.680

5.150

Using the ordinary least square regression calculator :

The equation of best fit obtained is :

ŷ = -0.07637X + 61.36874

Slope = - 0.07637 (depicts a negative relationship between the variables).

Intercept = 61.36874

Score, X = explanatory variable ; Interest rate, Y = response variable

Answer:

pythagorean theorem is the way to go

a squared plus b squared =c squared

15 squared plus 8 squared is equal to c squared

so i believe the answer is 17

Step-by-step explanation:

15 squared is 225

225 + 64

64 is 8 squared

that is 289

THE ANSWER IS 17

Answer:

B

Step-by-step explanation:

Answer:

Sofia will be 19 years old

Step-by-step explanation:

First:

What know that David is 30 right now.

David=30

We also know that David is 7 years older than Mark, meaning that David-7=Mark

30-7=23        -Mark

And last we know that Mark is 4 years older than Sofia So we would do 23-4 to get Sofia age,

23-4=19        -Sofia

So in conclusion...

SOFIA: 19  

MARK: 23

DAVID: 30

Answer:

6 pencils

Step-by-step explanation:

30/5=6

Answer:

The margin of error for a 95% confidence interval is 0.199.

Step-by-step explanation:

We have that to find our [tex]\alpha[/tex] level, that is the subtraction of 1 by the confidence interval divided by 2. So:

[tex]\alpha = \frac{1 - 0.95}{2} = 0.025[/tex]

Now, we have to find z in the Ztable as such z has a pvalue of [tex]1 - \alpha[/tex].

That is z with a pvalue of [tex]1 - 0.025 = 0.975[/tex], so Z = 1.96.

Now, find the margin of error M as such

[tex]M = z\frac{\sigma}{\sqrt{n}}[/tex]

In which [tex]\sigma[/tex] is the standard deviation of the population and n is the size of the sample.

Assume that the population standard deviation is 2.8.

This means that [tex]\sigma = 2.8[/tex]

760 millennials (18- to 33-year-olds)

This means that [tex]n = 760[/tex]

Give the margin of error for a 95% confidence interval.

[tex]M = z\frac{\sigma}{\sqrt{n}} = 1.96\frac{2.8}{\sqrt{760}} = 0.199[/tex]

The margin of error for a 95% confidence interval is 0.199.

Answer:

lol dont know

Step-by-step explanation:

Answer:

X+y=17

X=y+13

y+13+y-13=17-13

2y. =4

y=2.

X=2+13

X=15

the two numbers are 2 and 15

Answer:

5

Step-by-step explanation: