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cricket20 [7]
3 years ago
15

_________________represents the amount or quantity of something. It could be discrete or continuous. Examples are number of fema

le students in CMU, heights of students in a class
Mathematics
1 answer:
Evgen [1.6K]3 years ago
4 0

Answer:

variable

Step-by-step explanation:

A variable is a symbol that represents a single quantity but it is called a variable because the quantity/value/amount is unknown and it can take on (can be) any possible value (number). The word "variable" itself means "values that vary". This means that the value is unknown as it stands but it can take on any value or outcome.

You can call this variable anything, in Maths we often use letters.

eg. X is the variable we're interested in. X can take on any number. Let X be the number of people living in a house. For this example lets say X = 8. ie. there are 8 people living in the house.

- in this case x is discrete.

There are two types of variables: discrete and continuous.

<u>Discrete variable: </u>

- countable; nothing in between, can only take on a finite number of values

This is a variable that ca take on any countable number along an interval. A way of thinking about a discrete variable is to think of is as a count. Anything that you can count as whole numbers.

Eg. X is a discrete variable whose <u>value lies along the interval [2;3]</u>. This means the value of  X can ONLY be 2 or 3.

Examples include: number of apples, number people, toes, trees, real numbers on an interval (2,3,4,5,6..), ages of a group of friends, rounded of values etc.

<u>Continuous: </u>

- can take on an infinite number of values; always something in between; impossible to count realistically

A continuous variable means that it can take on any value along an interval between to whole numbers. It is continuous along that interval.

Eg. X is a continuous variable whose <u>value lies along the interval [2;3]</u>. This means that it can take on absolutely any value that lies between 2 and 3: 2.00000000001 or 2.9999999 or even just 2.5. The options are endless.

Examples include: height, weight, temperature etc.

<u>SIDE NOTE: </u>

This can be extended to a random variable which follows the same concept except applies it to probability. You shouldn't be confused with this because while a variable represents a single quantity, a random variable represents the outcome of a process: a value that follows a specific probability distribution which is determined from a probability function. Therefore, it can take on multiple values. Look into this only if necessary.

:)

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Convert 32 kilometers per hour to miles per day. (3.28 feet 1 meter)
bonufazy [111]

Answer:

477.09 mi/da

Step-by-step explanation:

If student must use conversion given, 3.28ft = 1m, then the following works:

32km/hr = ______mi/da       1 day = 24 hrs, 1m=3.28ft, 1km=1000m,1mi=5280ft

32km/hr  x  24hr/day  x  1000m/1km  x  3.28ft/1m  x  1mi/5280ft  = 477.09mi/da

If student can use 1km = 0.62mi, some steps can be skipped.

3 0
3 years ago
Julio says, "If you subtract 19 from my number and multiply the difference by - 7, the result is - 28." What is Julio's number?
ra1l [238]

Answer:

23

Step-by-step explanation:

Basically I did it backwards & opposites:

-28 divided by -7 = 4

4 + 19 = 23

I checked btw and it worked.

4 0
2 years ago
What is the probability of rolling a dice at most 3 times until a 6 occurs
IRISSAK [1]

Answer:

Probablity of getting six in at most three roll= 0.199.

Step-by-step explanation:

Given: Dice rolled at most 3 times untill a 6 occurs.

First, finding the probablity of getting 6 in a dice if rolled once.

Probablity= \frac{chances\ of\ occurance}{Total\ number\ of\ event}

We know, dice have six side, therefore, total number of event will be 6.

∴ Probablity of getting six in one roll= \frac{1}{6}

As given, Dice is rolled at most 3 times.

Now, finding the probablity of getting 6 in a dice if rolled 3 times.

∴ Probablity of getting six in three roll= \frac{1}{6}+(\frac{1}{6})^{2} +(\frac{1}{6})^{3}

⇒ Probablity of getting six in three roll=  \frac{1}{6}+\frac{1}{36} +\frac{1}{216}

Taking LCD 216

⇒Probablity of getting six in three roll= \frac{1\times 36+ 6\times 1+1}{216}

⇒Probablity of getting six in three roll= \frac{43}{216}

∴Probablity of getting six in three roll=0.199

           

3 0
3 years ago
IF CORRECT ILL MARK U BRAINLIEST❤️
natulia [17]

Answer:

Step-by-step explanation:

y/x = 12/4 = 3

5 0
3 years ago
Read 2 more answers
What should be multiplied with -25/36 to get -5/9​
Ierofanga [76]

Answer:

\frac{4}{5}

Step-by-step explanation:

\frac{-\frac{5}{9}}{-\frac{25}{36}}=\\\\-\frac{5}{9}*(-\frac{36}{25})=\\\\\frac{4}{5}

6 0
2 years ago
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