Three out of nineteen students will ride in a car instead of a van. How many ways can those three students be
chosen? Use the following formula.
n!
r
C(n, r) = r!(n-1)!

Answers

Answer 1
it would be 3 and n r

Related Questions

What is 5/9 of 18? I need it for my homework.

Answers

Answer:  10

Step-by-step explanation:  

(5 x 18) / 9 = 90/9 = 10

Answer:

Step-by-step explanation:

Simplify y ^2 over 6y^5.

Answers

Answer:

1/6y^3

Step-by-step explanation:

Answer:

1/6y^3

Step-by-step explanation:

cancel the common factor of y^2 and y^5

Simplify.
Rewrite the expression in the form 4^n.
4^8
4^3

Answers

1024 i hope its the answer

What would be 82% of 50

Answers

10% = 5
80% = 40
2% = 1
82% = 41

41

Answer:

82% of 50 is 41

Step-by-step explanation:

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If you pay $1.49 a pound for chicken and 2/3 of the weight is bone. How much are you paying per pound of meat?

Answers

9514 1404 393

Answer:

  $4.47 per pound

Step-by-step explanation:

Your cost is ...

  $1.49/(1/3 lb) = $1.49×(3/1)/lb = $4.47/lb

What is the value of the x?

Answers

Answer:

53

Step-by-step explanation:

37+90=127

180-127=53

An object weighs 1 pound on earth weighs about 1/15 pounds on Pluto. If a man weighs 240 pounds on earth how many pounds would he weigh on Pluto?

Answers

Answer:

16 I believe. 240 divided by 15 is 16.

Question 4
0/20 pts
PLEASE HELP!!!: The slope of a line is –3 and the
y-intercept is (0,4). What is the
equation of the line in slope-intercept
form?

Answers

9514 1404 393

Answer:

  D.  y = -3x +4

Step-by-step explanation:

The slope-intercept form is ...

  y = mx + b

where m is the slope (-3) and b is the y-intercept (4). Putting these values into the form gives ...

  y = -3x +4 . . . . . matches choice D

John has two different sugar syrups. Syrup A is 2 parts of sugar and 8 parts of water, and Syrup B is 3 parts of sugar and 5 parts of water. How much of each should john mix together to get 280 quarts of syrup that is 3 parts sugar and 7 parts water.

Answers

Answer:

Volume of syrup A = 120 quarts

Volume of syrup B = 280 - 120 = 160 quarts .

Step-by-step explanation:

Syrup A : 2 parts sugar , 8 parts of water .

Total = 10 parts

Syrup B : 3 parts sugar , 5 parts of water .

Total = 8 parts .

Mixture required 280 quarts , 3 parts sugar , 7 parts water

In 280 quarts , sugar = 280 x 3  / ( 3 + 7 )

sugar = 84 parts

Let volume of syrup A be x , volume of syrup B = 280 - x

sugar A =  2 x / 10 = 0.2 x

sugar B = 3 ( 280 - x ) / 8 = .375 ( 280 - x )

Total sugar =  .2 x + .375 ( 280 - x ) = 84 .

.2 x + 105 - .375 x = 84

105 - 84 = .375 x - .2 x = .175 x

.175 x = 21

x = 21 / .175 = 120

Volume of syrup A = 120 quarts

Volume of syrup B = 280 - 120 = 160 quarts .

John mixes 120 quarts of syrup A and 160 quarts of syrup of B together to get 280 quarts of syrup that is 3 parts sugar and 7 parts water.

Given that,

John has two different sugar syrups.

Syrup A is 2 parts of sugar and 8 parts of water, and Syrup B is 3 parts of sugar and 5 parts of water.

We have to determine,

How much of each should john mix together to get 280 quarts of syrup that is 3 parts sugar and 7 parts water.

According to the question,

Syrup A: 2 parts sugar, 8 parts of water.

Total number of parts = 10 parts

Syrup B : 3 parts sugar, 5 parts of water.

The total number of parts  = 8 parts.

The mixture required 280 quarts, 3 parts sugar, 7 parts water,

In 280 quarts, parts of sugar are,

[tex]= \dfrac{280 \times 3 }{ ( 3 + 7 )}\\\\= \dfrac{280 \times 3}{10}\\\\= 84[/tex]

 

Let the volume of syrup A be x,

And the volume of syrup B be 280 - x

[tex]Sugar\ A = \dfrac{2x}{10} \\\\Sugar \ A = 0.2 x[/tex]

[tex]Sugar \ B = \dfrac{3 ( 280 - x ) }{8 }\\\\Sugar \ B= .375 ( 280 - x )[/tex]

The total amount of sugar is,

[tex]0.2 x + 0.375 ( 280 - x ) = 84 \\\\0.2 x + 105 -0 .375 x = 84\\\\105 - 84 = 0.375 x - 0.2 x = 0.175 x\\\\ 0.175 x = 21\\\\x = \dfrac{21}{0.175}\\\\x = 120[/tex]

Therefore,

The volume of syrup A = 120 quarts

Volume of syrup B = 280 - 120 = 160 quarts

Hence, John mixes 120 quarts of syrup A and 160 quarts of syrup of B together to get 280 quarts of syrup that is 3 parts sugar and 7 parts water.

For more details, refer to the link.

https://brainly.com/question/11921451

if you can help please do :)

Answers

Step-by-step explanation:

A

[tex]180 - 60 - 70 = 50 \\x = 180 - 50 = 130 \\ x = 130[/tex]


Tania Ramirez purchases 25 hanging file folders for $6.99. What is the price
per folder?

Answers

25/6.99 (25 Folders) ($6.99) = $3.58 per folder

An automobile manufacturer sold 30,000 new cars, one to each of 30,000 customers, in a certain year. The manufacturer was interested in investigating the proportion of the new cars that experienced a mechanical problem within the first 5,000 miles driven. a) A list of the names and addresses of all customers who bought the new cars is available. Each customer from a simple random sample of 1,000 customers who bought one of the new cars was asked whether they experienced any mechanical problems within the first 5,000 miles driven. 400 customers from the sample reported a problem. Of the 400 customers who reported a problem, 140 customers, or 32.5%, reported a problem specifically with the power door locks. Explain why 0.35 should not be used to estimate the population proportion of the 30,000 new cars sold that experienced a problem with the power door locks within the first 5,000 miles driven.

Answers

Answer:

The reason that 0.35 should not be used to estimate the population proportion of the 30,000 new cars sold that experienced a problem with the power door locks within the first 5,000 miles driven is that 0.35 does not represent the sample proportion.

The correct sample proportion is 0.14 (140/1,000) and not 0.35 (140/400).  It is this that can be used to estimate the population proportion and not 0.35.

Step-by-step explanation:

a) Data and Calculations:

New cars sold by the automobile manufacturer = 30,000

Number of customers that the 30,000 new cars were sold to = 30,000

Simple random sample = 1,000 customers

Number of customers from the SRS that reported a problem = 400

This is equal to 40% of the sample (400/1,000 * 100)

Proportion of customers who reported a problem (specifically) with the power door locks = 140/400 = 0.35

Proportion of customers out of the sample that reported specifically a problem with the power door locks = 140/1000 = 0.14.

Can I get some help on this

Answers

Answer:

the first one, 2.5x

Step-by-step explanation:

Hope this helps!

Which equation represents the line that has a slope of 4 and passes through the point (2, 7)?​

Answers

Answer:

The answer is y = 4x - 1.

Step-by-step explanation:

☆The equation we'll be using: y = mx + b

☆Since we already have the slope. we have to find the y-intercept.

☆[tex]y = mx + b \\ \\ 7 = 4(2) + b \\ 7 = 8 + b \\ \frac{ - 8 = - 8 \: \: \: \: \: \: \: \: \: \: \: }{ - 1 = b \: \: \: \: \: \: \: \: \: \: } [/tex]

☆Using the information we gathered and was given, we just to put them together.

☆[tex]y = 4x - 1[/tex]

Answer:

y=4x-1

Step-by-step explanation:

HOW DO YOU GRAPH USING LINER PROBLEMS

Answers

Answer:

You need to plot points onto the graph

Step-by-step explanation:

It takes only 2 points to draw a graph of a straight line. In other words, if we can find two points that satisfy the equation of the line, then the line can be accurately drawn. But it can be more than 2 points as well. IT CANNOT BE 1. Just 1 point can fo anything at all. You cannot make a linear line or a line in general with just one point. You need 2 or more to make a line.

You need to plot points onto the graph hopefully this helps

4. If 4 bananas weigh 4 4/5 kilograms , how
many kilograms would you expect 3
bananas to weigh?
A.
//
C. 3
B. 1
}
D. D.8

Answers

Answer:

It's the same process, change 4 4/5 to an improper fraction = 24/5 then set up a proportion

4 bananas/(24/5) kg = 3 bananas/x kg take cross products

4x = 3 (24/5) = 72/5  divide by 4 (this is the same as multiplying by 1/4)

x = 72/20, change this to a mixed number = 3 12/20 = 3 3/5 kg

Step-by-step explanation:

In a ceiling function, which is the graph of g(x)= [x+3]?

Answers

9514 1404 393

Answer:

  see below

Step-by-step explanation:

Adding 3 to x shifts the function's graph 3 units to the left. That makes the graph look like the one attached.

Alyssa's cat weighs 12 pounds, which is 3/8 of the weight of her dog. Use the equation 3/8d=12 to find the weight of Alyssa's dog.

Answers

Answer:

0.5 pounds!

Step-by-step explanation:

3/8=0.375
12/0.375=32

Her dog is 32 pounds

Solve the Equation

P + 75 = 100.

Answers

Answer:

P= 25 so

25+75= 100

Step-by-step explanation:

100-75

Answer:

P=25

Step-by-step explanation:

P+75=100

  -75  -75

_________

P=25

write the number seventeen thousand and forty-eight in figures

Answers

Answer:

17 048

hi lets be freinds pleeease

Step-by-step explanation:

Seventeen thousand is 17,000 ( 5 figures)
Fourth eight is 48 (2 figures)
add them up 17,000+48 = 17048

solue each by trial and error method.. 3+x=8​

Answers

Answer:

x=5

Step-by-step explanation:

Move the constant to the right-hand side and change its sign. Then subtract the numbers.

Answer:

X=8-5

X=5

Step-by-step explanation:

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The figure below is a square with dimensions given.

Part A: What is the perimeter of the square in terms of x?
2x - 1 in


Perimeter = ________

Part B: If the length of each side of the square is doubled, what would be the perimeter of this new square, in terms of x?



Perimeter = ________


Part C: If x = 5, what would be the ratio of the area of the original square to the area of the new square?


Answer: ____________________

Answers

Answer:

A: 8x-4

B: 16x-8

C: 1:2

Step-by-step explanation:

I need help does anyone know the slope intercept for this one?

Answers

Answer:

(0,2)

Step-by-step explanation:

The slope-intercept (aka y-intercept) is where the line crosses the y-axis. And the slope-intercept is at (0,2)

Hope this helped!

Have a supercalifragilisticexpialidocious day!

What would the slope of a line be to line perpendicular to the following: Y = 2x - 2

Answers

Answer:

-1/2x

Step-by-step explanation: negative reciprical

The ratio of girls to boys in Lizas classroom is 5 to 4 how manny girls are in her classroom if there is a total of 27 students.

Answers

Add the ratios: 5 + 4 = 9

Divide total students by 9:

27/9 =3

Girls are listed first so the 5 part of the ratio is girls.

Multiply 5 by the 3 from above:

5 x 3 = 15

There are 15 girls.

Answer:

There are 12 girls in the classroom because if you take 4+4+4=12 and you do the same with 5 so 5+5+5=15 then add them together you get 27. So, therefore, your answer would be 12

Step-by-step explanation:

One batch of cookies makes 18. How many
batches will you need to make to be sure you
have at least 100

Answers

Answer:

6

Step-by-step explanation:

100/18=5 1/2

18*6=108

Answer : 18x5=90 18x6=108

Step-by-step explanation:

A mathematical phrase represented by numbers, variables, and operations is a(n)
pls help:)

Answers

Answer:

Expression

Step-by-step explanation:

Answer: Expression

Got this right!!!

Hope this helps!!!

i23
= i20+3
Use the example as a model. Simplify the
expressions.
= i20 x 1
737
x ;3
= 15 x ;
= 1x is

Answers

Answer:

- I^20+1 i= /2 i^2= -1 i^3= -i i^4= 1 for every four it repeat itself. 4, 8, 12, 16, 20. therefore i^20=1 1+1=2.

Sorry if I'm wrong!

Q. One yard equals three feet. How many
yards are there in 63 feet? Type your
answer in the box
yards.

Answers

Answer:

21 yards

Step-by-step explanation:

There will be 21 yards in 63 feet of the measurement.

What is an expression?

Expression in maths is defined as the relation of numbers variables and functions by using mathematical signs like addition, subtraction, multiplication and division.

Given that one yard is equal to three feet. There are 63 feet of measurement.

The value of 63 feet in yards will be calculated as:-

1 yard = 3 feet

1 feet = 1 / 3  yards

63 feet = ( 63 / 3 ) yards

63 feet = 21 yards

Therefore, there are 21 yards in 63 feet of the measurement.

To know more about an expression follow

https://brainly.com/question/358500

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a bird bath that is 3 ft talk casts a shadow that is 2 ft long.Find the height of a tent that casts a 6 ft shadow.

Answers

Answer:

is it 5ft

Step-by-step explanation:

if the bird bath had a foot taken off in the shadow then wouldn't a foot be taken off for the tent as well

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