Definition of dray. : a vehicle used to haul goods; especially : a strong cart or wagon without sides.
Expressions versus Equations. A difference between expressions and equations is what each represents. An expression shows a math relationship. One key to an expression is that there is no solution. An expression does not have an answer. An expression, however, can be evaluated. To evaluate an expression, substitute values for the variables.
â¢ An equation is two or more expressions with an equality condition and the equation is true for one or several values of the variables. An equation makes complete sense as long as the equality condition is not violated.