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A variable expression has at least one variable in it (which is usually a letter that stands for an unknown number).
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How do you evaluate an expression when given values for the variables?
You replace each variable by its value. Then you do the indicated calculations.
When a variable appears in the denominator of one or more terms it is called equation?
Only if it has an equality sign otherwise it is an expression.
What is an expression that contains only numbers and operations?
It is a numerical expression.
What is a mathematical phrase that uses variables numbers and operation symbols?
An expression.
What is a numerical expression?
5+6+36-4=43 * * * * * That is an equation, not an expression. An expression might be 5+6+36-4 or 43 but when you put the + sign (or <, > etc) it becomes an equation (or inequality).
What is the difference between a numerical expression and a variable expression?
A variable expression includes variables.
Do a variable expression consist only of numbers?
No, because numbers never vary. A variable expression must have something in it that can take on different values, usually a letter, like 'x' for example.
When can you say that an algebraic expression is a polynomial?
A polynomial is a linear combination of non-negative integer powers of a variable. A linear combination means you can multiply the terms by constant numbers before summing them. The terms can consists of only positive integer powers of the variable or a constant.
What is the expression for x equals 3 and y equals 6?
A mathematical expression in its' most simplistic form, merely assigns a value to a variable. Don't confuse an expression with an equation. An equation requires a solution. An expression cannot be "solved". It only allows you to determine the value of a variable. This is the expression in words "x is equal to 3" (X is the variable which is equal to the constant number 3) This is the expression in numbers "x=3" The expression in words "y is equal to 6" (Y is the variable which is equal to the constant number 6) The expression in numbers is "y=6" I hope you understand now.
Can you solve for a variable in an expression?
No, you can only simplify an expression. To solve for a variable, it must be in an equation.
How do you evaluate an expression when given values for the variables?
You replace each variable by its value. Then you do the indicated calculations.
Does a unary expression consists of only one operand with no operator?
No, a unary expression consists of one operand and one operator
What do you call an expression that contains only numbers and operations?
A expression that only contains numbers is a Numerical
What is an expression that contains only numbers?
A numerical expression!
Do All expressions contain variables?
No, not all expressions contain variables. An expression is a mathematical phrase that combines numbers, variables, and mathematical operations. A variable is a symbol that represents a quantity that can vary, such as x or y. Some expressions may only contain numbers and mathematical operations, such as addition, subtraction, multiplication, and division. For example, "3 + 5" is an expression that only contains numbers and the addition operation. However, an expression that contains at least one variable is known as an algebraic expression, and this type of expression is commonly used in algebra to represent mathematical relationships between variables. For example, "2x + 4" is an algebraic expression that contains the variable x and represents a linear equation in which y is equal to two times x plus four.
What is x in this equation -4x20?
There is, unfortunately, n equation in the question: only an expression. An expression cannot be solved for a variable.
What is an expression contains only numbers?
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