Suppose there are 21 students in your class. If the teacher draws 2 names at random, what is the probability that you and your best friend will be chosen?


1/20

1/105

1/210

2/21​

Answers

Answer 1

Answer:

2/21

Step-by-step explanation:

Probability = expected outcome/ possible outcome

Answer 2
2/21 is ur answer because u got 2 people outta a 20 chance of drawing that student

Related Questions

Which of the following is true of the data set represented by the box plot?
box plot with point at 16, min at 33, Q1 at 40, median at 52, Q3 at 55, max at 78, and point at 86
The greatest value in the set is 79.
The data is evenly distributed throughout the middle half.
The data has an IQR of 45.
Removing the outliers would not affect the median.

Answers

Answer:

D. Removing all the outliers would not effect the median

Step-by-step explanation:

Among the choices provided above the one that is true of the data set represented by the box plot is Removing the outliers would not affect the median.

(credits to  

Maddycolgrove and Answer Expert Verified Brainly User)

The plastic cylinder has a diameter of 2 cm. There is a rectangular 0.6 cm square prism through the middle of the cylinder, extending from the top to the bottom. The height of the cylinder is 6 cm. Find the volume of the cylinder without the prism.

Answers

Answer:

The volume of the cylinder without the prism is approximately 16.690 cubic centimeters.

Step-by-step explanation:

The volume of the cylinder without the prism can be defined as the volume of the entire cylinder ([tex]V_{cy}[/tex]), measured in cubic centimeters, minus the volume of the prism ([tex]V_{pr}[/tex]), measured in cubic centimeters. That is:

[tex]V = V_{cy}-V_{pr }[/tex] (1)

[tex]V = \frac{\pi}{4}\cdot D^{2}\cdot h - l^{2}\cdot h[/tex]

[tex]V = \left(\frac{\pi}{4}\cdot D^{2}-l^{2} \right)\cdot h[/tex] (2)

Where:

[tex]D[/tex] - Diameter of the cylinder, measured in centimeters.

[tex]l[/tex] - Side of the square prism, measured in centimeters.

[tex]h[/tex] - Height of the square prism, measured in centimeters.

If we know that [tex]D = 2\,cm[/tex], [tex]l = 0.6\,cm[/tex] and [tex]h = 6\,cm[/tex], then the volume of the cylinder without the prism is:

[tex]V = \left[\frac{\pi}{4}\cdot (2\,cm)^{2}-(0.6\,cm)^{2} \right]\cdot (6\,cm)[/tex]

[tex]V \approx 16.690\,cm^{3}[/tex]

The volume of the cylinder without the prism is approximately 16.690 cubic centimeters.

HELLLPPP PLSSSSS(don’t answer if you aren’t serious this is important)

Answers

9514 1404 393

Answer:

∠Q ≅ ∠U∠Q ≅ ∠U'∠S ≅ ∠V

Step-by-step explanation:

The following angles are equivalent:

  Q = U = 45°

  R = T = W = 225°

  S = V = 90°

  X = 135°

Reflection, any rigid transformation, or any uniform dilation will not change the measures of the angles. That is, U = U', for example.

So, the true angle statements are ...

∠Q ≅ ∠U∠Q ≅ ∠U'∠S ≅ ∠V

PLEASEEEEEEE HELPPPPPPPPPPPPP

Answers

A,paper crane B, 6

Step-by-step explanation:

the inequality sign is less than or squeal the highest number u can get is 6 before going higher than 30

Which could be the degree of the function represented by the graph?
A. 5
B. 1
C. 3
D. 4

Answers

Answer:

C

Step-by-step explanation:

Plzz help me to find coefficient in binomial theorem (25 points)

Answers

Denote x2 by y.

 

(x2-3)7=(y-3)7

 

This is a binomial expansion in y, and you want the coefficient of y4 because y4=x8

 

You have 7 terms of (y-3) in (y-3)7.  To get the fourth power of y, you need to choose y from four of the terms.  The number of ways you can do this is the combinations of 7 things taken 4 at a time.  This is:

 

7!/(4!3!)=35

So, the coefficient of x8 in the given expansion will be 210.

HOPE IT HELPS

THANK YOU

What is the solution to the equation 3x+2--x-5?
0 X=-B
x=-7
OX= 7
O X=8

Answers

Answer:

it x=-8 do it

Step-by-step explanation:

Algerba 1 (polynomials) plss help

Answers

Answer:

Step-by-step explanation:

the coefficient is the number that is multiplied by x² so is 17

the constant term is the one without any x ( it does not change when x changes) so is -13


Find the equation of the straight line which passes through the point (2,3) and is
inclined at 30° to the positive direction of the x-axis.

Answers

Answer: y = 1.73*x - 0.46

Step-by-step explanation:

For a linear equation of the form:

y = a*x + b

Where a is the slope and b is the y-intercept.

If we have an angle of A degrees with respect to the x-axis, the slope of the function can be calculated as:

Tan(A) = a.

in this case, we have we have an inclination of 30° to the positive x-axis (measured from the positive y-axis) and we know that the angle between the positive x-axis and the positive y-axis is 90°, then the angle measured from the positive axis will be such that:

A + 30° = 90

A = 90° - 30° = 60°

Then the slope is:

a = Tan(60°) = 1.73

Then we have the equation:

y = 1.73*x + b

And we know that this line passes through the point (2, 3) then we can replace x by 2 and y by 3 in the equation, and find the value of b.

3 = 1.73*2 + b

3 - 1.73*2 = b = -0.46

Then the equation is:

y = 1.73*x - 0.46

please please please help​

Answers

Answer:

See below.

Step-by-step explanation:

Slope of parallel line is -3/2.

Slope of perpendicular line is 2/3

Answer

see below

step-by-step explanation
slope of parallel lines is -3/2.
Slope of Perpendicular line is 2/3.

What is the value of the expression 3x2 – 2y, if x - -2 and y = -4. 0 20 52 O-8 02​

Answers

Answer:

I think the answer is 20....I'm so sorry if that is wrong :[

The given expression at {x} = - 2 and {y} = -4 evaluates to 20.

What is function?

A function is a relation between a dependent and independent variable. We can write the examples of functions as -

y = f(x) = ax + b

y = f(x, y, z) = ax + by + cz

Given is the expression -

3x² - 2y

The given equation is -

3x² - 2y

For {x} = - 2 and {y} = -4, we can evaluate the expression as -

3(-2)² - 2(-4)

3 x - 2 x - 2 - 2 x - 4

3 x 4 + 8

20

Therefore, the given expression at {x} = - 2 and {y} = -4 evaluates to 20.

To solve more questions on functions, visit the link below-

brainly.com/question/30194223

#SPJ7

the main sailboat has the dimensions shown in figure at the right . what is the height of the main sail? ​

Answers

Answer:

H = 11.3 or 11.4

Step-by-step explanation:

[tex]\frac{11sin46}{sin44}[/tex] = 11,3908...

[tex]\frac{11sin46}{sin44}=11,3[/tex]

(Im not sure)

convert 4 miles to feet
A. 21,120
B. 21,000
C. 22,000
D. 20,210

Answers

Answer: A. 21,120

Step-by-step explanation: Good luck! :D

The correct answer is A
A. 21,120

Use SUBSTITUTION to solve the system
y=4x
2y-2x=12

Answers

1 Substitute
y
=
2
x

10
y=2x−10 into
y
=
4
x

8
y=4x−8.
2
x

10
=
4
x

8
2x−10=4x−8

2 Solve for
x
x in
2
x

10
=
4
x

8
2x−10=4x−8.
x
=

1
x=−1

3 Substitute
x
=

1
x=−1 into
y
=
2
x

10
y=2x−10.
y
=

12
y=−12

4 Therefore,
x
=

1
y
=

12



x=−1
y=−12

What is a power function and what restrictions does it have?

Answers

Answer:

A power function is a function with a single term that is the product of a real number, a coefficient, and a variable raised to a fixed real number.

Step-by-step explanation:

What are the solutions to 3n-1> 8 or 4n+3 < -1 ?

how would you write it in interval notation?

HELP ASAPPP PLZZZ​

Answers

Step-by-step explanation:

3n - 1 > 8 or 4n + 3 < -1

3n > 9 or 4n < -4

n > 3 or n < -1

Solution set: (-∞, -1) U (3, ∞).

If the diameter of a circle is 80m, then what is the radius of the circle

Answers

Answer:

40m

Step-by-step explanation:

Radius is half of diameter

(2, 5) and (-4, 5)
If these points are graphed on a coordinate plane, what is the distance between them, in units?

Answers

Answer:6 units

Step-by-step explanation:

Tell whether the equation has one solution, no solution, or infinitely many solutions. 3x - 7 = 3(x - 3) + 2​

Answers

Answer:3x-7=3(x-3)+2

3x-7=3x-9+2

3x-7=3x-7

Group like terms

3x-3x=-7+7

0=0

Step-by-step explanation: the above calculations implies that, the equation has no solution, since all the unknown variables also vanish to zero.

A computer store buys a computer system at a cost of $487.20. The selling price was first at $812, but
then the store advertised a 30% markdown on the system. Answer parts a and b.
a. Find the current sale price.
The sale price is $0
Round to the nearest cent as needed.)
NEEED HELP ASAP

Answers

Answer: a. The sales price $568.40

b.the price for the club members is $511.56

Step-by-step explanation: I have no idea I got it wrong on porpoise to get the correct answer for u

describe the horizontal and/or vertical shifts used to transform the equation y=|x| to the equation y=|x|+4

Answers

It will move 4 to the right horizontally

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!JJ

Answers

Answer:

its

Step-by-step explanation:

i cant explane

Help pls yall i will give brainliest

Answers

Answer:

B.

Step-by-step explanation:

PLEASE DUE IN 5 MIN
Charlie is trying to choose between two bike rental companies, Jokes and Spokes and Wheeling. Jokes and Spokes charges $25 initial fee and an additional $5 for each hour rented. Wheeling charges an initial fee of $18 and an additional $6 for each hour rented.

The total cost to rent a bike from Jokes and Spokes can be represented by the equation c = 5h + 25, where h represents the number of hours rented and y represented the cost in dollars.

The total cost to rent a bike from Wheeling can be represented by the equation c = 6h +18, where h represents the number of hours rented and y represented the cost in dollars.

For how many hours of rental is the amount charged by the two companies the same? What is the cost, in dollars, of renting the bike for this many hours?

Answers

7 hours and $60

Step-by-step explanation:

25+5x7=60 and 18+6x7=60

.......... .. ........ I..

Answers

What but what’s even the question
.......... | ..... | .. |

24/80 expressed as percent rounded to the nearest whole number is?

Answers

Answer:

0.3

Step-by-step explanation:

3/10

3x10^-1

24 is 30% of 80, so 30%

Solve 4k−16
the solution is __



2. graph the solution.

Answers

Root:(4,0 )
Domain:k€ℝ
Range:y€ℝ
Vertical intercept : (0,-16)

) What are the solutions of -1<=x-3<4 ?​

Answers

The solutions are 1!42

Darron bought a new PS5. He made a down payment of $300, and he will pay $50 each month until the phone is paid off. Which equation represents the relationship between x, the number of monthly payments Darron has made, and y, the total amount he has paid?
A. y= 50x + 300

B. y= -50x + 300

C. x= 50y + 300

D. y= 50x – 300

Answers

Answer:

A

x=months y=total payment

vote brainliest

I NEED THE ANSWERS QUICK!!! PLEASE TELL ME ILL GIVE BRAINLIEST!!!!!!!!!!!!

Answers

Answer:

(3,-8) (2,-10)

Step-by-step explanation:

Graph and see where the points are, if they are in the solution, they are correct.

Please mark me brainlist and solve the question I just asked.

Have a good day :)

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