The coefficient
The number is called the coefficient of the variable
a variable expression
Substituting.
That is often called the coefficient.
That is called 'solving'.
The number is called the coefficient of the variable
a variable expression
It is called the coefficient of the variable
Substituting.
That is often called the coefficient.
A variable is a letter that represents a number. An expression that contains at least one variable is called variable expression, also called algebraic expression. A variable expression has one or more terms. A term is a number, a variable, or a product of numbers and variables. For example,3(x^2)y + 2xy + x - 7 is a variable expression, where you have 4 terms.When working with variable expression, you often use the substitution principle:If a = b, then a may be replaced by b in any expression.The set of numbers that a variable may be represent is called replacement set, or domain, of the variable. To evaluate a variable expression, you replace each variable with one of its values and simplify the numerical expression that results.Example: Evaluate the expression 2x - 4y for x = 5 and y = -9.Solution:2x - 4y= 2(5) - 4(-9)= 10 + 36=46
That is called 'solving'.
That looks like the description of an EXPRESSION. However, an expression need not have "at least one operation"; a single number, or variable, is a perfectly valid expression.
It is the coefficient of the variable
The term for replacing a variable with another value or expression is "substitution."
It is a poorly worded question. Any number in an expression can be a numerical variable.
A variable is a letter that represents a number. A n expression that contains at least one variable is called a variable expression or an algebraic expression.A variable expression has one or more terms. A term is a number, a variable, or a product of numbers and variables.An algebraic expression consisting of only one term is called a monomial (3x, xy, 2y, xyz); of two terms is called a binomial (x + y, x^2 - 1, a + 2b); of three terms is called trinomial (x + 2y - 4, 3x^2 + 2xz +3). In general, an algebraic expression consisting of two or more terms is called a polynomial