1.1: using variables

Question 1

a symbol, usually a letter, that represents one or more numbers.

Answer 1

variable

Question 1

is a mathematical phrase that can include numbers, variables, and operation symbols.

Answer 1

algebraic expression

Question 2

is a mathematical sentence that uses an equal sign

Answer 2

equation

Question 3

an equation that contains one or more variables is an

Answer 3

open sentence