Identify parts of an expression

What is the difference between an expression and an equation?

• An expression has an equal sign and represents a value, while an equation does not.

• An expression does not have an equal sign and represents a value, while an equation states that two expressions are equal.

• An expression is a type of equation that includes variables, while an equation is a fixed statement.

• An expression can only contain numbers, while an equation can contain both numbers and variables.

How do you identify the number of terms in an expression?

• Count the number of separate parts in the expression. For example, in @@7x + 5^3 - 1@@, there are 3 terms.

• Count the number of variables in the expression.

• Count the number of coefficients in the expression.

• Count the number of operations in the expression.

What is the role of parentheses in an expression?

• Parentheses indicate which operations to perform first in an expression.

• Parentheses are used to group terms that should be added together.

• Parentheses are only used in equations, not in expressions.

• Parentheses have no effect on the order of operations.

What is the difference between a term and a coefficient?

• A term is a single part of an expression, while a coefficient is the number in front of a variable in a term.

• A term can only be a number, while a coefficient can be a variable or a combination of both.

• A term is always a variable, while a coefficient is always a number.

• A term is a complete expression, while a coefficient is a part of a term.

What does the term 'like terms' mean?

• Terms that have different variables

• Terms that have the same variable raised to the same power

• Terms that are always positive

• Terms that can be added together regardless of their variables

What is the value of the constant in the expression @@x - 10@@?

• -10

• 10

• 0

• -5

What does the term 'evaluate' mean in mathematics?

• To calculate the value of an expression by substituting numbers for the variables.

• To simplify an expression without calculating its value.

• To compare two expressions and determine which is larger.

• To graph an expression on a coordinate plane.

What is the expression @@4x - 3y + 2x + 5@@ simplified?

• @@5x - 3y + 5@@

• @@6x - 3y + 4@@

• @@6x - 3y + 5@@

• @@4x - 3y + 7@@

How do you combine like terms in an expression?

• You multiply the coefficients of like terms.

• You add or subtract the coefficients of like terms. For example, @@3x + 5x = 8x@@.

• You ignore the coefficients and only add the variables.

• You divide the coefficients of like terms.

What is a variable in mathematics?

• A constant value that does not change.

• A letter or symbol that represents an unknown number. For example, in the expression @@x + 3@@, x is a variable.

• A type of equation that has no solution.

• A fixed number used in calculations.