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.
An equation admits of description in two ways:â It may be regarded purely as an algebraic expression, or as a geometrical locus. It is a mere symbol, like the algebraic expression which stands for a curve.