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3 years ago

Which is an example of a function?

Mathematics

2 answers:

Svetradugi [14.3K]3 years ago

6 0

Answer:

The example of a function is:

The price of a piece of cloth and the length of the cloth.

Step-by-step explanation:

We know that a function is a relation in which each element of a set is mapped to a single element of the other set.

i.e. an element has just one image.

The time it takes to mow a lawn and the age of the person mowing the lawn.

This is not a example of function since, the time taken by two person's of different age may be same to mow a lawn.

This means that there is more than one image of a single element i.e. time.

The distance to school and the time you spend at school.

The time one spend at school at different days may be different even if the distance to school is same.

The price of a movie ticket and the height of the customer.

Two person's with different height will buy a movie ticket at the same cost.

Hence, this relation won't be a function.

The price of a piece of cloth and the length of the cloth.

As we know that the price of a cloth is fixed according to the length.

Hence, the relation is a function.

( As corresponding to each price we have a unique length if a piece of clothing )

Anton [14]3 years ago

5 0

Answer:

The price of a piece of cloth and length of cloth.

Step-by-step explanation:

A function must be measurable, attainable, and reasonable and the variables must complement each other

Measuring the distance to and time spend at school doesnt complement each other

The price of a movie ticket doesn't change based on height

Mowing a lawn doesnt matter how old you are

The price of cloth can change based on how long or short the cloth is.Shorter clothes are cheaper, while Longer clothes are more expensive.

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RSB [31]

Answer:

Step-by-step explanation:

1 since it's -1 inside it moves to the right

and it's positive 3 outside so it goes up 3

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3 years ago

I need some help with this math question

Vilka [71]

The answer is 63 cm bc 30 60 90 triangles have a rule where the short leg is x longer is x√3 and the hypotenuse is x2
you can see this if you imagine the triangle as equilateral then cutting it in half

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3 years ago

7) PG & E have 12 linemen working Tuesdays in Placer County. They work in groups of 8. How many

BabaBlast [244]

Part A

Since order matters, we use the nPr permutation formula

We use n = 12 and r = 8

$_{n}P_{r} = \frac{n!}{(n-r)!}\\\\_{12}P_{8} = \frac{12!}{(12-8)!}\\\\_{12}P_{8} = \frac{12!}{4!}\\\\_{12}P_{8} = \frac{12*11*10*9*8*7*6*5*4*3*2*1}{4*3*2*1}\\\\_{12}P_{8} = \frac{479,001,600}{24}\\\\_{12}P_{8} = 19,958,400\\\\$

There are a little under 20 million different permutations.

<h3>Answer: 19,958,400</h3>

Side note: your teacher may not want you to type in the commas

============================================================

Part B

In this case, order doesn't matter. We could use the nCr combination formula like so.

$_{n}C_{r} = \frac{n!}{r!(n-r)!}\\\\_{12}C_{8} = \frac{12!}{8!(12-8)!}\\\\_{12}C_{8} = \frac{12!}{4!}\\\\_{12}C_{8} = \frac{12*11*10*9*8!}{8!*4!}\\\\_{12}C_{8} = \frac{12*11*10*9}{4!} \ \text{ ... pair of 8! terms cancel}\\\\_{12}C_{8} = \frac{12*11*10*9}{4*3*2*1}\\\\_{12}C_{8} = \frac{11880}{24}\\\\_{12}C_{8} = 495\\\\$

We have a much smaller number compared to last time because order isn't important. Consider a group of 3 people {A,B,C} and this group is identical to {C,B,A}. This idea applies to groups of any number.

-----------------

Another way we can compute the answer is to use the result from part A.

Recall that:

nCr = (nPr)/(r!)

If we know the permutation value, we simply divide by r! to get the combination value. In this case, we divide by r! = 8! = 8*7*6*5*4*3*2*1 = 40,320

So,

$_{n}C_{r} = \frac{_{n}P_{r}}{r!}\\\\_{12}C_{8} = \frac{_{12}P_{8}}{8!}\\\\_{12}C_{8} = \frac{19,958,400}{40,320}\\\\_{12}C_{8} = 495\\\\$

Not only is this shortcut fairly handy, but it's also interesting to see how the concepts of combinations and permutations connect to one another.

-----------------

<h3>Answer: 495</h3>

5 0

2 years ago

A resturant orders 50 pounds of hamburger every week.they sell six pounds of hamburger every day.how much hamburger is left at t

murzikaleks [220]

Answer:

8 pounds

Step-by-step explanation:

6 pounds of hamburger x 7 days a week = 42 pounds of hamburger used

50 - 42 = 8 pounds of unused hamburger at the end of the week

6 0

3 years ago

What is the mean deviation of the following numbers 2 4 6 8 10 12

olga nikolaevna [1]

Step-by-step explanation:

mean is always equal to additon of total no.s by total no.s

2 + 4 + 6 + 8 + 10 + 12

=42

total no.s = 6 no.s

42/6

therefore 7 is the answer which is the mean deviation of the following no.s .

3 0

3 years ago