A teacher wants to choose a student at random. The teacher decides to choose the first person to walk through the classroom door at the start of the lesson.
a. Explain why this is not a good method.
2. Suggest a better method.

Answers

Answer 1

Answer:

The first person to arrive is not random. The person that mostly arrives first every time is the person who lives closest to the school, or is a teacher's pet.

The odds of the person who lives 20km away from the school being first are way lower than anyone else.

A better method, would be everyone writes their name on a paper, and the teacher picks one at random from a hat.


Related Questions

Which expression is equivalent to 36a-12b?

3(6a-2b). 6(6a-2b). 3(6a+2b). 6(6a+2b)

Answers

Answer:

6(6a-2b)

Step-by-step explanation:

Answer:

6(6a-2b)

Step-by-step explanation:

if you multiply the 6 by what's in parenthesis you get 36a-12b

Pl help it’s for a grade

Answers

Step-by-step explanation:

Given,

1. The given expression is [tex]\sqrt[10]{x^9}[/tex].

We need to write it into exponential form.

We know that,

[tex]\sqrt[a]{x} =x^{1/a}[/tex]

Here, a = 10

So,

[tex]\sqrt[10]{x^9}=(x^9)^{1/10}\\\\=x^{9\times \dfrac{1}{10}}\\\\=x^{9/10}\\\\=x^{0.1}[/tex]

2.

[tex](\sqrt[4]{3y} )^3\\\\=((3y)^3)^{1/4}\\\\=3^{3\times \dfrac{1}{4}}\times y^{3\times \dfrac{1}{4}}\\\\=3^{3/4}y^{3/4}[/tex]

Hence, this is the required solution.

someone smart pls help

Answers

Answer:

5

Step-by-step explanation:

-2^2=-4

3^2=9

add

-4+9=5

8 yd
6 yd
15 yd
10 yd
Answer:




please help!:)

Answers

Answer:

What's the question???

Step-by-step explanation:

The data show the number of pieces of mail delivered to a single home address each day for three weeks.

4, 0, 2, 6, 1, 0, 3, 4, 0, 2, 4, 1, 5, 2, 3, 1, 1, 2

Which statement is true about a graph representing the data? Select two options.
The number line of a dot plot would start at 1.
A dot plot would show 7 points for numbers greater than 2.
The intervals on a histogram should be 0 to 2, 3 to 4, and 5 to 6.
A histogram would have a maximum of 7 bars.
A histogram should not show a bar that includes 0 pieces of mail.

Answers

Answer:

B) A dot plot would show 7 points for numbers greater than 2.

D) A histogram would have a maximum of 7 bars.

Step-by-step explanation:

quiz on edg told me ;)

The true statements are:

B. dot plot would show 7 points for numbers greater than 2.

D. histogram would have a maximum of 7 bars.

What is a Dot Plot and a Histogram?

A dot plot uses dots to show each data point, while for histogram, the frequency for the data values are depicted by bars or bins.

In the data ste given, 7 of the data points are greater than 2. So, the dot plot for the data distribution would display 7 points for values greater than 2.

Also, there are 7 different values, which are from 0 - 6. This will require 7 bars if we want to represent the data on a histogram.

Therefore, the true statements are:

B. dot plot would show 7 points for numbers greater than 2.

D. histogram would have a maximum of 7 bars.

Learn more about the dot plot and histogram on:

https://brainly.com/question/14577528

find the value of x please ​

Answers

Answer:

it should be 47 because of (3x-4)

Step-by-step explanation:

Please help, I'm having a hard time with this ;-;

Answers

Answer:

A

Step-by-step explanation:

3 times steep means slope is 3 times

slope=4

new slope =3×4=12

translated 7 down means y intercept-7=1-7=-6

so new eq. is y=12x-6

Answer:

A

Step-by-step explanation:

So we know that the slope is 4, and we want to make it 3 times as steep, so that would be 12. The y-intercept is one and we want to move it down 7 units, 6-7= -1. So our final answer would be y= 12x-6!

How many solutions does the system of equations below have? y = −6x + 9 y = 98x − 3

Answers

Answer:

one solution

Step-by-step explanation:

by subsitution,elimination and comparison

The diameter of a circle is 11 cm. Find its area to the nearest tenth.

Answers

Answer:

95.0

Step-by-step explanation:

Area of a circle

A = πr2

Radius is half the diameter = 11/2 = 5.5

A = π x 5.5 x 2

= 95.033177...

= 95.0

4 1/5 kg: 630 g simplify this question

Answers

Answer: 2646kg

Hope this helps

(50 POINTS) Math Inverse Functions please help

Answers

Answer:

See below.

Step-by-step explanation:

a. See pic below.

b. Yes because it passes the vertical line test. Any vertical line moving horizontally across the graph intersects only one point on the graph at a time.

c.

Domain: all real numbers

Range: all real numbers greater than or equal to 4

d.

Domain: all real numbers greater than or equal to 4

Range: all real numbers

e.

See pic below.

f. No because it does not pass the vertical line test.

Work out m and c for the line:y=3x-2

Answers

y = mx + c
m = gradient
c = y-intercept

Therefore, m=3 and c= -2

B
✓97
B
4

A
9
С
Select all true statements:
A) sin (©) = Vo
| B) tan (8) = 3
| C) tan (8) =
D) cos(B) = to
E) 42 +92 = 97

Answers

the answer is in the picture I’ll send u a link here phs.dcsdk12.org the answer is in there good luck!

Answer:

I need help with the answer as well

Step-by-step explanation:

The equation of the line A is 3x+2y=10.line B is parallel to line A and passes through the points (4,6).find the equation of the line B.​

Answers

Answer: [tex]y=-\frac{3}{2}x+12[/tex]

Step-by-step explanation:

To find the equation of line B, we need to find the slope first, then the y-intercept. We first want to convert line A into slope-intercept form, so we can find the slope.

[tex]3x+2y=10[/tex]            [subtract both sides by 3x]

[tex]2y=10-3x[/tex]            [divide both sides by 2]

[tex]y=5-\frac{3}{2}x[/tex]

With the slope-intercept form of line A, we can see that the slope is [tex]-\frac{3}{2}[/tex]. We take the slope and the given point (4,6) to find the y-intercept of line B.

[tex]y=-\frac{3}{2}x+b[/tex]            [plug in (4,6)]

[tex]6=-\frac{3}{2}(4)+b[/tex]         [multiply]

[tex]6=-6+b[/tex]              [add both sides by 6]

[tex]b=12[/tex]

With the y-intercept, we know the equation for line B is [tex]y=-\frac{3}{2}x+12[/tex].

0.8(m - 5) = 10

What is m equal to?

Answers

Answer:

Step-by-step explanation:

I can help

Step 1

0.8(m - 5) = 10  Simplify

Step 2

0.8(m - 5) = 10  simplify the equation

0.8m-4=10

Step 3

0.8m-4=10  Add 4 to the sides

0.8m=14

Step 4

0.8m=14  Divide the sides by 0.8

17.5

Answer

m=17.5

Hope this helps

Mr Keen, a band teacher wanted to know if certain types of instruments are
more appealing to one gender or the other. So he conducted a survey of his
students preferences. The results are complied in the chart below: What is the
ratio of the number of girls preferring woodwind instruments to the number of
boys preferring woodwind instruments? *
Instruments
Boys
Girls
15
23
Strings
Woodwind
19
30
Brass
27
13
Percussion
32
25
Your answer
P

Answers

Answer:

23:22

Step-by-step explanation:

See the image!

The freezing point of oxygen is about -218°C. The freezing point of phosphorous is about 262 C higher. What is the
approximate freezing point of phosphorous
11 ?

Answers

Answer:

44.1°C

Step-by-step explanation:

This tetratomic vapor condenses to liquid white phosphorus which freezes at 44.1°C to solid white phosphorus, a soft, waxy, colorless material.

Ariana just started a running plan where she runs 7 miles the first week and then increases the number of miles she runs by 10% each week. If she keeps up this plan for 12 weeks, how many total miles would Ariana have run, to the nearest whole number?​

Answers

Answer: sarah ran 150 miles in 12 weeks

Step-by-step explanation:

Please help!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Answers

Answer:

C

Step-by-step explanation:

There is a larger variety of lengths in the 9th grade textbook

the local market is selling a pound of bananas for $0.55. if you bought 8 bananas for $1.44, what is the unit rate?

Answers

Answer:

$0.18

Step-by-step explanation:

Given that :

Number of bananas purchased = 8

Cost at which the 8 bananas were purchased = $1.44

The unit price of bananas can be obtained using the relation :

Total Cost of bananas / number of bananas

Unit price = $1.44 / 8

Unit price = $0.18

Price per unit of banana = $0.18

Below is the graph of the equation y=|x+2|-1. Use this graph to find all values of x such that
y>0
y<0
y=0
Please Help I will award the brainiest

Answers

Answer:

y>0,        -3>x> -1

y<0,        -3<x<-1

y = 0,       x = -3 and x = -1

Step-by-step explanation:

Answer:

Agree with the other answer but for RSM users, if y>0, type in: x>-1, x<-3 or the server won’t accept your answer.

Have a good day!

I just need help with these question

Answers

Answer:

No links sorry :<

Step-by-step explanation:

So what is it because I can’t see anything

Find the area of the composite figure use 3.14 for pi

Answers

Answer:

the area is 200.96

Step-by-step explanation:

Answer:

89.135

Step-by-step explanation:


Find the interest earned in Mrs. Charlie's account after 4 years, if she had
deposited $11,000 in her account. The bank pays a compound interest of 8.4%
annually.

Answers

Answer:

11012.4

Step-by-step explanation:

4 + 11000 = 11004

11004 + 8.4 = 11012.4

Assume that θ is an acute angle in a right triangle satisfying the given conditions. Evaluate the 5 remaining trigonometric functions. Sketch a triangle in the correct quadrant and label.

sec θ= 17/15
sin θ<0

Answers

Answer: See step by step. Replace the x with theta

Step-by-step explanation: Since sin is less than zero, and secant is positive. This means the trig values are in Quadrant 4.

We know that secФ=17/15. We need to find sin,cos,tan,csc, and cot.

We can find tangent by using the identity

[tex]tan^{2} (x)+ 1=sec^{2} (x)[/tex] where x is theta.

[tex]tan^{2} (x)+1=\frac{289}{225}[/tex]

[tex]tan^{2} (x)+\frac{225}{225} =\frac{289}{225}[/tex]

[tex]tan^{2}(x)=\frac{64}{225}[/tex]

tan x=[tex]\frac{8}{15}[/tex], Tangent in the fourth  quadrant is negative  so  the answer is instead

[tex]tan x= -\frac{8}{15}[/tex]

We can find cotangent by taking the recipocial of tan so

[tex]cot=-\frac{15}{8}[/tex]

We can find cos by taking reciprocal of sec remeber that cosine is positive in 4th quadrant so the answer is

[tex]cos =\frac{15}{17}[/tex]

We can find sin by doing quoteint identies.

[tex]\frac{sin x}{cos x} =tan x[/tex]

[tex]\frac{ sin x}{15/17} =-\frac{8}{15}[/tex]

[tex]sin x= -\frac{8}{17}[/tex]

To find csc, take reciprocal of sine.

[tex]csc=\frac{-17}{8}[/tex]

Please help, I am extremely bad at graphing.

Answers

The correct answer is c

i need help plz giving brainlist

Answers

Answer:

625

Step-by-step explanation:

it is essentially 5*5*5*5

If the shorter rectangle is 1 unit long, how many units long is the longer rectangle?

Answers

Answer: 2 units long

Whatever greater than 1 unit

In the picture please help me ):D

I anwsers some maybe u can anwser the rest and tell me if I got the ones I anwserd right or wrong thank chu :]

Answers

Answer:

the first pic is 400 and the

second pic u got right its 500

Answer:

2. 400       1. 500    5.  160     3.  560

I went in order of the pictures so the numbers are weird.

pls help will give u brainlist

Answers

option D is the correct answer.

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