What Are Variables? — Definition & Examples
Read this topicExplanations 3
- Variables A variable is a placeholder for an unknown quantity. Usually, variables are denoted by English or Greek letters or symbols such as xxx or θ.\theta.θ. Examples: In the …
By Iris, Benjamin Qi, Caroline K, Alex Federspiel
- What is a variable? For example, in x2+2xx^2 + 2xx2+2x, what is xxx? Or in x5−10x−12=0x^5 - 10 x-12=0x5−10x−12=0, what is xxx? The quick answer is, xxx is a place-holder. It's a…
By James Madden, Colin, Jonathan Heller, Alex Federspiel, Joshua Siktar
- (Video) Definitions by mathman1024 Here's a video by mathman1024 where he goes over some basic definitions in algebra. A constant is any number. A constant doesn't change. Ex: 5…
By Alex Federspiel
Problems 47
- In the equation y=mx+by=mx+by=mx+b which symbols are variables?
- True or False\text{True or False}True or False === In the equation 3A+4a=123A+4a=123A+4a=12, the AAA and the aaa are the same variable.
- True or False\text{True or False}True or False === There's a limit to the amount of variables you can use in one equation.
- True or False\text{True or False}True or False === There are symbols that aren't variables.
- Every day Bob spends aaa hours inside the shower and bbb hours outside the shower, for a total of hhh hours. Which of a,b,ha,b,ha,b,h are non-constant variables?
- Which symbol should be the first variable in any given equation?
- A group of mathematicians have conspired together to write the most frustrating cookbook to ever exist. All of the amounts are listed in variables, in order increasing with size…
- Which symbols in the following equation are variables? x+π=7−34yx+\pi=7-\frac{3}{4}yx+π=7−43y
- Choose all of the variables that appear in the following expression: x+y2+(π)z(e)(i)x+y^{2}+(\pi)z^{(e)(i)}x+y2+(π)z(e)(i)
- When is something a variable?
- The formula for the surface area of a cylinder is A=2(π)rh+2(π)r2A=2(\pi)rh+2(\pi)r^2A=2(π)rh+2(π)r2 Which of the symbols contained within are variables? Select all that apply.
- Suppose the fee that a cell phone service company offers is 10\1010 per month, with an extra 0.01\0.010.01 per minute spent on the phone and an extra 5\55 per month per extra ph…
- In a given NFL football season, each team plays 161616 games in the regular season, then the top teams play in the playoffs for up to 444 rounds, culminating in the Super Bowl. …
- Every year for the Oscars, a set group of movie professionals vote to nominate up to ten movies for Best Picture, then vote again later for the winner. Which of the following ar…
- Which of the following is true about common multiples?
- Select the following that are guaranteed to be a multiple of two numbers xxx and yyy?
- How many common multiples are there of any pair of positive numbers xxx and yyy?
- Which of the following would always create a fraction equivalent to mn\frac{m}{n}nm?
- Is 1m\frac{1}{m}m1 for any integer m>1m>1m>1 in simplest form?
- Which of the following operations, when applied to mn\frac{m}{n}nm, will always create an equivalent fraction? Select all that apply.
- Select the variables in the equation. C=2πrC=2\pi rC=2πr
- Select the variables in the equation. y=ax+gy=a^x+gy=ax+g
- True or False\text{True or False}True or False === Your first variable should always be xxx.
- What does the variable ccc stand for?
- If mn\frac mnnm is an improper fraction, what must be true about mmm? Assume the variables mmm and nnn represent positive integers.
- True or False\text{True or False}True or False === If you have some fraction, ab\frac abba, where a,ba,ba,b are positive integers and a−b>0a-b>0a−b>0, then the fraction is impr…
- True or False\text{True or False}True or False === A variable cannot be an exponent.
- He doesn't have room on his shield to carve this observation down, and paper is too expensive. What is a shorter but more abstract way to express Knight Zero's observation, if h…
- Farmer John has a poor memory, so he would like a more efficient way to express the pattern using two variables, aaa and bbb, serving as placeholders for whole numbers. Which eq…
- How many variables are there in the following equation? x+2y+10=20yx+2y+10=20yx+2y+10=20y
- How many variables are there in the following equation? eiπ+1=0e^{i\pi} + 1=0eiπ+1=0 hint: feel free to do a bit more research on e,i,πe, i,\pie,i,π!
- Below is the equation for the force between two objects: F=Gm1m2r2F=G\frac{m_1m_2}{r^2}F=Gr2m1m2 Select the variables.
- Can we solve for the variable in the equation below? x−π=0x-\pi = 0x−π=0
- Variables are placeholders for numbers in expressions. For example, the expression x+1x+1x+1 represents "one more than xxx", where xxx is a variable. That means if x=1x=1x=1, th…
- Variables are placeholders for numbers in expressions. For example, the expression n2n^2n2 represents "the square of nnn", where nnn is a variable. That means if n=3n=3n=3, then...
- Which of the following are variable expressions? Select all that apply.
- Identify the expression on the left hand side of the equation x+1=22x+1 = 2^2x+1=22.
- How do we interpret the variable xxx in the equation x+3=7x+3 = 7x+3=7?
- The commutative property of addition says that the order in which you add two numbers does not matter. This property is commonly expressed using the equation a+b=b+aa+b=b+aa+b=b…
- What is the main difference between the variables aaa and bbb in the equation a+b=b+aa+b = b+aa+b=b+a (describing the commutative property of addition), and the variable xxx in …
- Select the variable(s) in the following equation. 3x+7=23x+7=23x+7=2
- True or False\text{True or False}True or False === We can use a variable to represent an expression with another variable in it.
- True or False\text{True or False}True or False === In the expression x−3x-3x−3, the variable xxx equals 333.
- Suppose we have two different prime numbers, aaa and bbb. Which of the expressions below is a common multiple of aaa and bbb?
- Which of the following is abcabcabc a common multiple of? \\ Check all that apply.
- If aaa and bbb are two different positive integers, how many common multiples do aaa and bbb have?
- If aaa is a prime number, then aaa is a multiple of which of the following?