Define Variables in Equations

Name the variable in the following number sentence:
2x -7 = 9

• x

• 2

• 7

• 2x-7

Define the term 'variable' as used in literal equations.

• A number that stays the same in an equation

• A letter that represents a constant value

• A value that cannot be changed in an equation

• A symbol that represents a quantity that can change or vary

Define variable

• a letter in the alphabet

• a letter or symbol standing for an unknown value

• a letter to grandma

• a letter to Santa

a symbol for an unknown value

• term

• operator

• variable

• coefficient

What does the y represent in this equation?

• input

• rise over run

• starting point

• output

What does the x in this equation represent?

• CoP

• input

• CROC

• unit rate

A letter or symbol that represents an unknown value is called ______________.

• Variable

• Radicand

• Coefficient

• Constant

A taxi charges a fixed fee plus a charge per mile (x = miles). The total cost can be calculated with the equation:

y = 2.75x + 4.25

What does x represent?

• The total cost of the fixed fee plus charge per mile

• The charge per mile

• Miles

• The fixed fee

• Karma

What are the variable(s) in this expression?
6g⁴ + 5h³ + j - 90

• g, h, j

• 6, 5, 1

• 4, 3

• 90

What is it?
x = 5

• Expression

• Equation