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What is a statement that two numberical or variable expressions are equal?
equivalent equations
When replacing variable with constant?
Rewrite the expressions, equations or inequalities where the constant takes the place of each occurrence of the variable.
What does it mean for a coordinate pair to be a solution to a system of equations?
It means that if you replace one variable with one of the numbers, and the other variable with the other numbers, and then evaluate the expressions on each side of the equations, the equalities will be true.
What is an advantage to using equations?
When given two names (variable expressions) for the same quantity, you can use algebra to solve the equation.
What is an advantage to using what equations?
When given two names (variable expressions) for the same quantity, you can use algebra to solve the equation.
What is the difference between algebra equations and expressions?
expressions don't have an equal sign and equations do
How are equations and expression similar?
Equations are made from expressions.
Do equations and expressions have addition?
They can but don't have to.
How can you solve problems involving equivalent expressions?
In the same way that you would solve equations because equivalent expressions are in effect equations
Do algebraic expressions have equals signs?
no algebraic expressions do not have equal signs but equations do.
What are the solutions to -x squared plus 2x plus 4 and x-2?
These are two expressions, not equations. Expressions do not have solutions, only equations do. NB equations include the equals sign.
What is the definition of equivalen variable expressions?
Two expressions are "equivalent" if they have the same result for any values of the variable or variables.
