Algebra

What does it mean to evaluate an expression?

• To calculate its value by substituting numbers for the variables.

• To simplify the expression without calculating its value.

• To rewrite the expression in a different form without changing its meaning.

• To find the maximum value of the expression.

What is a constant in algebra?

• A variable that can change value, such as x in the expression @@3x + 5@@.

• A fixed value that does not change, such as the number 5 in the expression @@3x + 5@@.

• An equation that represents a relationship between two variables.

• A term that can take on multiple values depending on the context.

What is a variable in algebra?

• A variable is a constant value that does not change.

• A variable is a symbol, often a letter, that represents a number in mathematical expressions or equations.

• A variable is a type of equation used to solve problems.

• A variable is a method of calculating the area of shapes.

What is the purpose of combining like terms in algebra?

• To make the expression longer and more complex.

• To simplify an expression by reducing the number of terms.

• To change the variables in the expression.

• To eliminate all the terms in the expression.

What expression represents "the difference of a number y and 6"?

• @@y - 6@@

• @@6 - y@@

• @@y + 6@@

• @@y / 6@@

Evaluate @@2a^2 + 3b - 4a@@ when @@a=6@@ and @@b=4@@.

• 50

• 60

• 70

• 80

What is the difference between an expression and an equation?

• An expression is a combination of numbers and variables with an equality sign, while an equation states that two expressions are not equal.

• An expression is a combination of numbers and variables without an equality sign, while an equation states that two expressions are equal.

• An expression is a single number, while an equation is a mathematical statement that includes a variable.

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

• @@4d + 3@@

• @@4d - 3@@

• @@d + 3@@

• @@3d + 4@@

What is the distributive property in algebra?

• The distributive property states that @@a(b + c) = ab + ac@@.

• The distributive property states that @@a(b - c) = ab - ac@@.

• The distributive property states that @@a + b = ab@@.

• The distributive property states that @@a(b + c) = a + b + c@@.

What is a coefficient in algebra?

• A variable in an algebraic expression

• A numerical factor in a term of an algebraic expression, such as the 7 in @@7x@@

• A constant term in an equation

• A symbol representing an unknown value