Simple Expressions With a Variable

a number that is multiplied by a variable(s)

• Constant

• Coefficient

• Variable

• Principal

a letter or symbol that represents a number

• Constant

• Coefficient

• Variable

• Principal

To make an equation or expression less complex

• Solution

• Simplify

• Equation

• Evaluate

A variable represented by a letter, such as x or y

• Unknown variable

• Linear graphs

• Control variable

• Dependent variable

Valerie has 'x' dollars. She spends $4 on lunch, but then she finds a $5 bill on the ground. Write a mathematical statement to express how many dollars Valerie has now.

• x-4+5

• 4x5+x

• 5-4-x

• x-4-5

Three times the sum of 2 and e. 

• 3e+2

• 3(e-2)

• 3(e+2)

• 2e+3

Amount you have spent if you buy a shirt for $20 and jeans for x dollars

• 20-x

• 20+x

• x-20

• 20x

A variable is a letter or symbol used to represent an unknown number.

• True

• False

a symbol for an unknown value; usually a letter (such as a, x, or y) is the symbol used

• constant

• variable

• coefficient

• term

Equations that can be rearranged to find the value of an unknown variable

• Simple equations

• Creating an equation

• Simplify

• Solution