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The answer is B+9 for apex you are welcome and have a good day

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Q: Ask us anythingIf b the number of blue bikes which variable expression represents the phrase below the sum of the number of blue bikes and the 9 red bikes?

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x is a variable that represents an unknown number and its value depends on the algebraic expression it is used in.

Your variable (a number) X, minus 100. X - 100

A variable is a single letter that represents a number. For example x is a variable.An algebraic expression can contain variables, numbers, mathematical symbols, etcetera. An example of an algebraic expression is 3x+12.

If the variable x represents the number: 5x + 3ParenthesesExponentsMultiplyDivideAddSubtractAlways remember this

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 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

A letter that represents a number is called a variable.

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

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.