Substitution

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 or expression.

Front

If x=5, what is the value of 7x-1?

Back

34

Front

If y=7, what is the value of 2(y+4)?

Back

22

Front

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

Back

42

Front

If y = -8, what is the value of -3y - 9?

Back

15

Front

What does it mean to evaluate an expression?

Back

To evaluate an expression means to calculate its value by substituting the variables with their respective values.

Front

What is the formula for finding the value of an expression with one variable?

Back

The formula is to substitute the variable with its value and perform the arithmetic operations.

Front

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

Back

11

Front

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

Back

7

Front

What is the value of 5x + 2 when x = 4?

Back

22