Exploring Algebraic Expressions and Operations

What is a variable in algebra?

• A number that is always known

• A symbol, usually a letter, that represents an unknown number

• A mathematical operation

• A constant value

Which of the following is NOT a way to represent multiplication in algebra?

• Using a dot (·)

• Placing numbers next to variables

• Using parentheses

• Using a plus sign (+)

What is a term in an algebraic expression?

• A symbol that represents multiplication

• A variable that is always negative

• A number that is always positive

• A part of an expression separated by addition or subtraction

Which of the following is a like term to 4x?

• 4

• x^2

• 2x

• 2

What is the coefficient in the term 7n?

• 7

• n

• 7n

• 1

What does the constant refer to in an algebraic expression?

• A number that is always changing

• A number without a variable

• A variable that is always positive

• A symbol that represents division

How would you represent 'ten dollars more than Anthony earned' if D represents the dollars Anthony earned?

• D + 10

• D - 10

• D / 10

• 10D

If G represents the number of gallons, how would you write 'four and one-half times the number of gallons'?

• 4.5G

• 4.5 + G

• G / 4.5

• G - 4.5

How would you write 'five less than three times the number of points' if P represents the points?

• 5 + 3P

• 3P - 5

• 5 - 3P

• 3P + 5

If W represents the width of a rectangle, how would you write the perimeter if the length is twice the width?

• W + 2W

• W + W + 2W + 2W

• 2W + 2W

• W + W + W + W