variables and expressions

A variable is a letter that represents an unknown number.

An example would be any letter like x, a, v, y, o, etc.

An expression is any single number or varible, or combination of operations involing numbers and variables. Some examples would be 3, x. 4y, +, -, ÷

definitions

new definitions
numerical coefficient- a number that multiplies the variable
2b

definitions

new defintions
constant number- a number that does not change and it increase or decrease the
value of an expression.

definitions

new definitions
value- a known or calculated ammount

definitions

new definitions
expression- any single number or variable, or combination of operations
involving numbers and variables
5,n,8+,x+1,2y-7,etc

definitions

new definitions
Variable- letter that represents an unknown number
x,a,n,etc

Homework Booklet 7.3: Adding Mixed Numbers #10

10. At a fundraiser dinner for a soccer team,

Dozen white buns and,

Dozen brown buns were eaten.

How many dozen buns were eaten in total?