Final review for Algebraic expressions Lesson 4

What is a variable?

It's a letter!

A variable is an unknown number that is represented by a letter.

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Example: 3 + n =5​

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Multiple Choice

What is a variable in Algebra?

• Something that changes
• An unknown value
• An equation
• A numeric expression

What is a coefficient?

A coefficient is the number that you multiple a variable with.

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For example: 3n + 2 --the coefficient is 3. ​

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Multiple Choice

What are the coefficients in an expression?

• The numbers multiplied by the variables

• The operations in the expression

• The constants in the expression

• The exponents in the expression

Multiple Choice

Identify the coefficients in this expression. 4 + 3x + 5x

• 3x, 5x

• 4, 3x, 5x

• 3, 5

• x

A Term

​Terms

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Multiple Choice

$$2m\ +\ 3y\ -\ 7$$  

How many terms are there in this expression?

• Three

• Five

• Two

• One

Multiple Choice

Which expression contains exactly 3 terms?

• 5 + 6xy
• 9 + 4t
• 8 + 2y - 5x
• 24xy

Multiple Choice

Translate this phrase into an algebraic expression.

The difference of 3 times a number and 7

Use the variable n to represent the unknown number.

• 3 - 7n

• 3n - 7

• 3n + 7

• 3 / 7n

Multiple Choice

Translate this phrase into an algebraic expression.
8 less than the product of 4 and a number
Use the variable m to represent the unknown number.

• 4m + 8
• 8m - 4
• 8m + 4
• 4m - 8

Multiple Choice

Nate has 6 fewer CDs than Emily.  If c represents the number of CDs Emily has, which expression tells how many CDs Nate has?

• 6-c
• 6+c
• c-6
• c+6

Multiple Choice

Mr. Gollow bought triple as many pencils as Ms. Boggs.  If Ms. Boggs purchased p pencils, then how many pencils did Mr. Gollow purchase?

• p/3
• p + 3
• p - 3
• 3p