Evaluate Expressions

Front

What is the formula to evaluate the expression ab ÷ c?

Back

To evaluate the expression ab ÷ c, substitute the values of a and b into the expression and divide the product by c.

Front

How do you evaluate an expression with multiple variables?

Back

Substitute the given values for each variable into the expression and perform the arithmetic operations according to the order of operations.

Front

What does the expression 18 ÷ 2a represent when a=3?

Back

When a=3, the expression 18 ÷ 2a becomes 18 ÷ (2*3) = 18 ÷ 6 = 3.

Front

What is the order of operations in evaluating expressions?

Back

The order of operations is Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right), often abbreviated as PEMDAS.

Front

How do you simplify the expression 9y ÷ (2x + 1) when x=7 and y=15?

Back

Substituting x=7 and y=15 gives 9*15 ÷ (2*7 + 1) = 135 ÷ 15 = 9.

Front

What is the result of the expression xz - 2y + 8 when x=7, y=15, and z=8?

Back

Substituting the values gives 7*8 - 2*15 + 8 = 56 - 30 + 8 = 34.

Front

What is the significance of parentheses in mathematical expressions?

Back

Parentheses indicate which operations should be performed first in an expression, following the order of operations.

Front

How do you evaluate the expression ab when a=3 and b=4?

Back

Substituting the values gives 3*4 = 12.

Front

What is the result of the expression 9y ÷ (2x + 1) for x=7 and y=15?

Back

The result is 9, as calculated by substituting the values into the expression.

Front

What does it mean to evaluate an expression?

Back

Evaluating an expression means to calculate its value by substituting the variables with their respective values and performing the necessary arithmetic operations.