Vocabulary review

An EQUATION is defined as...

• an equal sign

• a variable as a term

• an expression

• two equivalent expressions

When writing an equation from a word problem, you have to...

• get the answer right away

• write two expressions

• just find the total

What is a variable?

• A mystery number that cannot be known

• A mystery number that will be known IF it is in an equation

An inverse operation is

• reversing the sign in an inequality
• using the opposite operation to solve equations
•  A number’s distance from zero

Which of the following is an equation?

• 4x

• 3y - 18 + x

• 4x + 2 = 5 - x

Which of the following is an expression?

• 5x + 2 - 8 = 25

• 14 = 5y

• 2h + 8

• 9 - r = 17

Can you solve for x?

• No, because it is an expression

• No, because x is a factor

• Yes, because x = 10

• Yes, because x = 5

Can you solve for x?

• No, because its in an expression

• No, because x will always be a mystery

• Yes, because its the only variable in an equation

• Yes, because it needs to be unbalanced

Which scenario represents the equation:

v + 4 = 11

• Jasper has $7

• Jasper has $11. It is four more dollars than Valerie.

• Valerie has $4

• Jasper and Valerie have a total of $11

Which scenario represents the equation:

f - 5 = 17

• Gerald ran 17 miles, which was 5 miles fewer than Fiona.

• Fiona ran five miles less than 17 miles

• Gerald ran five miles less than 17 miles

• Gerald ran 17 miles and Fiona ran 12 miles