3n-7
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.
11-n
15-X
An algebraic expression can have a mixture of numbers and variables, but it does not contain an equals sign.
-10-18x
17x+(1+x)
If x is the unknown variable then it can be: x-16
3n-7
(x - 25)*4
The verbal expression that represents the algebraic expression 2x-8 is "twice a number decreased by 8." In this expression, "2x" represents twice the value of a variable "x," and "-8" indicates that 8 is being subtracted from that value. Therefore, "twice a number decreased by 8" accurately describes the algebraic expression 2x-8.
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.
The number is called the coefficient of the variable
Let the number be x and so the expression is: x-19
The number that multiplies a variable in an algebraic expression is called a coefficient. It is the numerical factor that is multiplied by the variable to form a term in the expression.
It is the coefficient of the variable
Sample Response: Replace keywords with variables, numbers, and operations. “A number squared” is a power where the base is the variable and the exponent is 2. “Decreased by ten” means you must subtract 10 from the squared number.