untitled

What is the difference between an expression and an equation

• Expressions have an equal sign and equations do not

• Equations have an equal sign and expressions do not

Which of the following are true about an equation? (Select all that apply)

• Contains an equal sign

• May contain variables

• Has many solutions

• Shows two expressions are equal

Natalie waters the lawn 3 times a week. If she watered the lawn 24 times in all, which equation could be used to find how many weeks she has been watering the lawn?

• x + 3 = 24

• 24 - x = 3

• 3x = 24

• x/3 = 24

Which of the following are expressions? (Select all that apply.)

• 3x + 4

• twelve is three more than nine

• the difference of x and 8

• 2y

Which of the following is an algebraic expression?

• 3 + 17 - k

• 3x - 45 = b

• 25 + 36

• 19 + 14 - 20

How many variables are there in this equation:

3x + 14 - 5y = 42

• 1

• 2

• 3

• 4

What is/are the coefficient(s) in the following expression?

5x - 8y + 3

• 5

• 8

• 5 and 8

• 3

What operation is this:

2x

• addition

• subtraction

• multiplication

• division

What does an algebraic equation have that a numerical equation doesn't have?

• variables

• equal sign

• terms

• fractions

A variable is...

• the number in front of a letter

• a value that does not change

• numbers and letters separated by operations

• an unknown number represented by a letter