There are 21 students in your class. The teacher wants to send 5 students to the library each day. The teacher will choose the students to go to the library at random each day for the first four days from the list of students who have not already gone.

What is the probability you will be chosen to go on the first day? Enter your answer as a fraction in simplest form.

Answers

Answer 1

Answer:

5C1/21C5

Step-by-step explanation:


Related Questions

Addison is going to invest $3,100 and leave it in an account for 15 years. Assuming the interest is compounded continuously, what interest rate, to the nearest hundredth of a percent, would be required in order for Addison to end up with $7,300?

Answers

Answer:

r= 5.71%

Step-by-step explanation

Just did it

Answer:

5.71%

Step-by-step explanation:

the width of a rectangle is 2 in less than its length the area is 24 square inches find the dimensions of the rectangle

Answers

Answer:

6,4

Step-by-step explanation:

Create a system of equations

l-2=w

w*l=24

Substitute

l-2*1=24

l=6

6-2=4

w=4

Dimensions of the rectangle are 6inch and 4 inch.

What is rectangle?

"Rectangle is a quadrilateral whose all  angles are right angle and opposite sides are parallel and equal in measurement."

What is dimensions?

" Dimension is measurement of any object such as length, width and height of any object."

What is area?

"Area is a space occupied by an object."

Let 'l' be the length of the rectangle.

According to the question,

Width = l - 2

Area= 24 square inches

Formula used

Area of a rectangle = length x width

[tex]24 = l[/tex] × [tex](l-2)[/tex]

⇒[tex]24[/tex] = [tex]l^{2} -2l[/tex]

[tex]l^{2} -2l -24=0[/tex]

⇒[tex]l^{2} -6l+4l -24 =0[/tex]

⇒[tex]l(l-6) +4(l-6) =0[/tex]

⇒[tex](l-6)(l+4) =0[/tex]

⇒[tex]l=6[/tex] or [tex]l= -4[/tex]

length cannot be negative.

Therefore, [tex]l=6[/tex]inch

⇒width = [tex]6-2[/tex]

⇒ width = 4 inch

Hence the dimensions of the rectangle are 6inch and 4 inch.

Learn more about dimensions of the rectangle here

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which expression is equivalent to -4(2k - 6) - 4k? Show your work.

A 4k + 24
B -8k + 20
C -12k + 24
D -12k - 24

Answers

Answer:

-12k+24

Step-by-step explanation:

-8k+24-4k

collect like terms

-12k+24

Answer:

C

Step-by-step explanation:

Multiply -4 ×2k ×-6k-6=

-8k + 24 - 4k =

-12k ÷ 24 is C

Solve for r 4/r 5/7

Answers

28/5 as a fraction and 5.6 as a decimal

very urgent can someone please solve thank you ​

Answers

Answer:

RP= 15.3 km (3 s.f.)

Step-by-step explanation:

Please see the attached pictures for the full solution.

y=x^{2}+2x-1
find the following
AOS, Vetex,Roots,Domain,Range, postive/negative, y-intercept

Answers

Answer:

Step-by-step explanation:

The measure of an angle is 142.5°. What is the measure of its supplementary angle?

Answers

Answer:

37.50°

Step-by-step explanation:

The sum of both sides of an angle is 180°.

180° - 142.5° = 37.50°

WILL GIVE BRAINLIEST

Answers

Answer:

V=πr²h

V=(3.14)(15cm)²(325cm)

V=229,613 cm³

Answer:

d

Step-by-step explanation:

trust me i used online calculator and got that exact answer

pls make me brainliest :)

**65 POINTS PLEASE ANSWER SOON**
If the fourth term of an Arithmetic sequence is 48 and the third term is 36...

(A) What is the first term?

(B) What is the twelfth term?

Answers

Answer:

1st term is 12

12th term is 144

Step-by-step explanation:

48-36=a4-a3=a1 so a1 is equal to 12  now to get from a3 to a4, you must add 12, so d=12.

a12=12+11*12=12+132=144

Our buyer client Heather just signed a purchase agreement for a $520,000 home. The LTVR is 60%. How much is Heather putting down on the purchase?

Answers

312,000$.

I just found 60 percent of 520,000 so I hope that’s what you wanted, and I am truly sorry if it isn’t.

which number line represents the solution to the inequality (will make brainliest) pls help

Answers

Answer:

C

Step-by-step explanation:

because the solution dors not include -3 but everything less than.

Can you help solve for x in these three problems?

Answers

Answer:

19) 4   21) 8   23) 6.31

Step-by-step explanation:

23) -1 +14x + 12x +17 = 180

26x+16=180

26x=164

x= about 6.31

HELPP MEE PLEASEEEE!!!

Answers

Answer:

1) 2

2) -2

3) -8

4) -2

Hope this helps!

PLEASE HELP!!!!! Which graph represents the solution to this set of inequalities?
TYSM! :)
(A,B,C,or D??)

Answers

Answer:

a is the answer

Step-by-step explanation:

.......................

two horses are filling a pool

Answers

Answer:

What is the actual question?

Step-by-step explanation:


Help pls ASAP


The population of rabbits in a local park reserve can be modeled by the function r(x) = 25250(1.08), where t represents the number of years.
Which statement is true based on the function?

Answers

Answer:

Step-by-step explanation:

Answer:D

Step-by-step explanation:

Mica translated Polygon C two units to the right and then reflected the image across the y-axis to get Polygon T. Sasha used one transformation to transform Polygon C to Polygon T. Describe the transformation that Sasha used.

Answers

Answer:

i hi k u r so weak i. maths

it's a simple question

Answer:

She did a 90° rotation clockwise.

Step-by-step explanation:

As u see if u did a reflection it would be at the same area but on the other side but if u do a 90° rotation clockwise it'll be at the same exact spot as Shape T. Is this really a highschool question??...

A company makes 140 bags.
48 of the bags have buttons but no zips.
49 of the bags have zips but no buttons.
23 of the bags have neither zips nor buttons.
A bag is selected at random.
What is the probability that the bag has buttons?

Answers

34.29% percentage
48/140 fraction
12/35 fraction simplified

30 points please help only serious ppl i BEG YOU
Write an inequality that represents the graph.

Answers

Answer:

ok let me slide

Step-by-step explanation:

Answer:y=3 x=1 + 4

Step-by-step explanation:

Shot in the dark honestly

Hi, can anyone help me with this. I'm really confused lol

Answers

Answer:

X=8

Step-by-step explanation:

since we know these lines are parallel that means that the 2 angels given to us are supplementary (add up to 180) so we add them together and set it equal to 180 to find X.

1. The table shows values of a function . What is the average rate of change of over the interval from x = 5 to x = 10? Show your work.

Answers

Answer:

increases by 1 each time

Step-by-step explanation:

3, 4, 5

Ann had $120 to spend on books. After buying 10 books she had $8.30 left. If each book costs the same, let b be the cost of each book Write an algebraic equation that represents the situation:

Answers

Answer:

11.17

120-8.30 an then ÷10

Answer:

120 - (10b) = $8.30

Step-by-step explanation:

−5(x+4)
Expand and Simplify the Expression

Answers

Answer: Simplify:-5x-20

Step-by-step explanation:

Solution: -5x-20

Last month, Margo bought a tree that grows 2.5 \text{ cm}2.5 cm2, point, 5, start text, space, c, m, end text each day. It was 5 \text{ cm}5 cm5, start text, space, c, m, end text tall when she bought it and now it is 65 \text{ cm}65 cm65, start text, space, c, m, end text tall.

Answers

Answer:

equastion: 5+2.5d=65

days: 24

Step-by-step explanation:

got it right on khan, sorry if late

HELP❗️❗️❗️❗️❗️❗️


Students observed a plant left by a window over several days. The pla
was watered daily. After three days, the plant began to grow towards
the window as shown above.
Which of the following best explains the student's observations?

Answers

Answer:

The plant is responding to the stimulus of the sunlight.

heat can be produced by - two things​

Answers

Burning and rubbing

Which of the following is the value for x?

Answers

Answer:

67

Step-by-step explanation:

Square the binomial below:
(x– 4)

Answers

Answer:

x^2-8x+16

Step-by-step explanation:

(x-4)^2

x^2-4x-4x+16

x^2-8x+16

On a particular flight, the airline's income was $95,280 for a jumbo jet carrying 290 passengers. If a first-class ticket costs $680 and a coach ticket costs $288, how many of each ticket were sold for the flight?

Answers

Answer:

30 first-class tickets were sold and 260 coach tickets were sold.

Step-by-step explanation:

Let a first-class ticket be represented by f and let a coach ticket be represented by c.

On a particular flight, a jumbo jet was carrying 290 passengers. So, the sum of the first-class tickets and coach tickets must sum to 290:

[tex]f+c=290[/tex]

The total income was $95,280. Therefore:

[tex]680f+288c=95280[/tex]

We can now solve the system of equations. First, we can simplify the second equation by dividing everything by 8:

[tex]85f+36c=11910[/tex]

From the first equation, we can subtract f from both sides:

[tex]c=290-f[/tex]

Substitute:

[tex]85f+36(290-f)=11910[/tex]

Distribute:

[tex]85f+10440-36f=11910[/tex]

Simplify:

[tex]49f=1470[/tex]

So:

[tex]f=30[/tex]

From the previous equation:

[tex]c=290-f[/tex]

Substitute:

[tex]c=290-30=260[/tex]

30 first-class tickets were sold and 260 coach tickets were sold.

Put these numbers in order from least to greatest: -4 2/5 -4.5 -5.1 -4.45 -5 -

Answers

Answer:

-5.1, -5, -4.5, -4.45,-4 2/5

Answer:

-5.1, -5, -4.5,-4.45,-4 2/5,

Step-by-step explanation:

Lets put all the number in decimal form from least to greatest.

-4 2/5= -4.4

Remember the lower the negative integer is, the higher it is on the number line.

-5.1, -5, -4.5, -4.45, -4 2/5,

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