Substituting Variables

Front

What is a variable in mathematics?

Back

A variable is a symbol, often a letter, that represents a number that can change or vary.

Front

Substitute x=4 into the expression 2x + 3. What is the result?

Back

11

Front

What does it mean to substitute a variable?

Back

To substitute a variable means to replace it with a specific value.

Front

If y = 5, what is the value of 3y - 2?

Back

13

Front

What is the value of x in the equation x + 7 = 10?

Back

3

Front

Substitute x=2 into the expression x^2 + 4. What is the result?

Back

8

Front

What is the expression for the sum of m and n if m=3 and n=5?

Back

8

Front

If a = 10, what is the value of 2a + 5?

Back

25

Front

What is the value of x in the equation 2x = 14?

Back

7

Front

Substitute x=1 into the expression 5x + 6. What is the result?

Back

11