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

Back

42

Front

If y = 4, find the value of 3y + 5.

Back

17

Front

What is the value of -6s - 5h if s = 9 and h = 5?

Back

-79

Front

If y = 7, find the value of 2(y + 4).

Back

22

Front

If a = 6 and b = 7, find the value of 15 - a - b.

Back

2

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 corresponding numbers.

Front

What is the first step in solving an equation using substitution?

Back

The first step is to identify the values of the variables that need to be substituted.

Front

How do you substitute a value into an expression?

Back

You replace the variable in the expression with the given value and then simplify.

Front

What is the result of substituting x = 3 in the expression 4x + 2?

Back

14