Substitution: replacing variables with numbers

Front

What is substitution in mathematics?

Back

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

Front

If n = 4, what is the value of 12 + n?

Back

16

Front

What does the expression y - 6 represent when y = 10?

Back

4

Front

How do you express 'a number decreased by 10' in algebraic terms?

Back

n - 10

Front

What is the algebraic expression for 'twice the sum of 2 and c'?

Back

2(2 + c)

Front

Calculate 2^2 + 3^2.

Back

13

Front

What is the value of x if 5 + x = 12?

Back

7

Front

If a = 3, what is the value of 2a + 4?

Back

10

Front

What does the term 'variable' mean in mathematics?

Back

A variable is a symbol used to represent an unknown value.

Front

What is the result of substituting 5 for x in the expression 3x + 2?

Back

17