Substitution

Front

What is substitution in mathematics?

Back

Substitution is the process of replacing a variable with a number or another expression to simplify or solve an equation.

Front

If p=3 and q=5, what is p + q + 2?

Back

10

Front

If a = 4 and b = 6, what is 3a + 5b?

Back

42

Front

If p=3 and q=10, find q^2 - p^2.

Back

91

Front

If k=5, find \frac{k+3}{4}.

Back

2

Front

If h=7, find h^2.

Back

49

Front

What is the formula for the area of a rectangle?

Back

Area = length × width.

Front

What is the formula for the perimeter of a rectangle?

Back

Perimeter = 2(length + width).

Front

What does it mean to evaluate an expression?

Back

To evaluate an expression means to calculate its value by substituting the variables with numbers.

Front

What is the order of operations in mathematics?

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.